Pretty much.
Rather than look at what other games are doing, which is definitely a factor to keep in mind, PD should be focused on delivering what motorsports is. Everything from the enthusiast stuff to pro Formula 1 racing. People tinker with their cars, modify their cars, even engine swap their cars. GT is really good about this aspect, but if it can be done in the real world, it should be in Gran Turismo. Forza is much better in this aspect, though Turn 10 do go to extremes as with drivetrain swaps - including cars which it would require a complete rebuild of the car. But other than that, they have an excellent system. You can even buy higher performance spark plugs.
People buy and sell cars, even parts, so there should be some kind of user Shop, and an Auction House so that people can sell cars, liveries, decals, whatever. Used cars should return too.
Many cars are race modified street cars. Race Mod needs to return. These cars have custom liveries to suit the driver. Some form of Livery Editor should be in Gran Turismo, powerful enough to be able to create any livery we want from history or our imagination. We should be able to make our own decals, and number/league plaques for fantasy racing leagues that users create. A suit and helmet editor wouldn't be a bad idea either. And it's about time a damage build appeared, at least a basic one.
A Course Maker is in order since race courses are designed and built in the real world, and would add all kinds of life to the series, along with Race Mod and the Livery Editor.
An Event Maker would give us challenges to race through when the single player game was played out. It should be capable enough to allow us to create an entire racing season, along with championships and points per event. Many want more fun, and in racing games, this is usually from the challenge of the bots. They need to be competitive without being as bash happy as in Forza and GRID Autosport. They need to make a fairly tight field, not spread out too much, and be a hassle to beat without being near impossible. It's probably time for a difficulty level to appear.
Online Mode needs to be brought up to the level of what players have in the most basic shooter. Nearly every other racer has a better online structure. The Event Maker would be a key feature of this. Club and league creation and management tools should be available.
Photo Mode should have the ability to make any shot imaginable, from grass level to helicopter and distant hillside shots, and PS4 is potent enough that a Movie Maker should be a part of it too. Replays need to be more like what is seen in live racing coverage. I'm sick to death of endless views from six feet to ground level. I want to see the race from above too! I like seeing panoramic views MUCH more. There are camera cranes all along these tracks, so for pete's sake use them. I'd love to be able to edit the camera positions and behavior per track, per
lap, and save them.
GT Mode needs to be massive. Many of us tout GT4 as the epitome of the single player racing experience, because it had nearly everything imaginable to do, from enthusiast level racing, challenge missions, Manufacturer Cups, Rally, all the way to LMP and Formula GT. GT3 had some great ideas too, a melding of them would be great. Quick edit: a number of people want to see drifting, touge, gymkhana, drag racing and the like. This should be off to the side in its own deal, so it's available if you want to do it, but if you don't want to or aren't any good at it, it's not put in the middle of some progression to interrupt racing and you get stuck doing something you hate.
One thing that needs to happen is for Kaz and the design team to decide what racing is going to be included by league in GT7, and build the game around that. For instance, assuming most of FIA sanctioned racing is going to be included, then enough cars from each league needs to be present to fill out a racing field. NO outclassed cars in a race, like having DTM cars race with Rally or BTCC cars fleshing out a grid. If they can't license enough teams, create fantasy cars with fantasy liveries. I believe Ferrari/Supercar Challenge does this, and qualified livery artists should be hired for this purpose. If a league can't be licensed, make a fantasy league such as Formula GT. I want to see some version of every league represented in GT7, including past leagues of yore like ALMS. Then these cars need courses to race through, so provide enough locations appropriate to the events. There should be locations from around the world so that DTM, ALMS/USSC, BTCC, WTCC, Rally... every league has a stable of courses from their region to race on. Bring back all the classic tracks from past GTs, this would help. And races should start and have rules appropriate for their respective events and leagues with rolling or standing starts, etc.
A small number of us have been asking for either sim style racing or even a "career" which mirrors a career in the real world. For this reason, I'd like to see a separate, true Career Mode which reflects the career path a real life kid would take from enthusiast to pro racing leagues. Kaz has something of that model in GT Academy, and many are all about the career tree in Project CARS. Personally, I'd like to see a progression from enthusiast Sunday Cup style "take your sports car and race" events leading into something like our Sports Car Club of America, a very structured amateur to semi-pro/pro group with several different levels of motorsports. And from winning a championship there, being "selected" (you choose) a league to race in for the championship through a season. I've been asking for some form of this since 2005, and P CARS has a rough version of it, Assetto Corsa too, so I think it's time Kaz gives us a taste of what it's like to go from punk kid to polished pro.
Whew... I need to formulate this into a "what I want to see" post.