I know it's easy for us to demand when we don't have to do the work, but I do think the game needs more content added in these updates. Besides the fact that it would add a little more excitement to the game overall and make it feel like its progressing better, that new content could be utilized to help make the grind less tedious... kinda.
Having more new cars in the update as "Featured" cars would give us something new to play with each week, and that content lining up with the Featured Career thing for that week would help. Then at least we would have a fresh car to level up in the Featured Tour and customize to use for the otherwise boring same-y feeling events.
When you boot up the game after an update and can't use any of the new stuff until you grind, it makes it feel like there isn't actually anything fresh or new and interesting. Figuring out a way to let us actually use the new content to do things would be a big positive step forward.
The way the game sits now, we basically have do 20+ races using old content to unlock 1 new car, and then that car gets 1 Showcase race and then... possibly nothing. Using the JGTC Skyline as an example, it has no rivals in the game to set up Free Play races with, the GTX hopper hasn't been in rotation for multiplayer, and because many people don't have it you can't even really do anything in private lobbies with it either other than abuse the trick to drive locked cars. At least the Aston will be able to be used in the GT2 hopper which is regularly in rotation.
I'm guessing this FOMO stuff isn't going anywhere though, as universally unpopular as it is, and T10 continue to show a lack of creativity and very little willingness to experiment, so might as well settle in.
The 6× accelerated tyre wear adds another level of aggravation for me.
You can just turn off the tire wear thing in difficulty and not have to worry about it. I did it for the Endurance Series thing because I didn't want to babysit the controller to tell the car to make a pit stop when I was having the AI drive for me.
Personally though, the tire wear strategy stuff is the only part of these that I find engaging at all as at least there is some mental stimulation trying to figure out the optimal strategy and it can be fun to see if you can make an alternate strategy work... Still not engaging enough for me to actually do more than one or two of them myself though, as I can get the strategy stuff in multiplayer as well where I can actually have a good/interesting/exciting race at the same time.
This is kinda part of the problem with all the complaining about Career content though too... Everyone talks about expanding the Career as if it's this no-brainer thing to do and totally unreasonable that they haven't so far, but everyone wants different things. If they do the same stuff over and over some complain it's boring, and if they do something like add tire wear to make it more interesting and introduce strategy to otherwise brainless monotonous events, some complain. They will never be able to please the different types of players in their playerbase, so it kinda seems that people would be better off just making their own events in Free Play where they can turn off tire wear or only drive race cars or never have to drive in the rain or whatever else they want... but for some reason Free Play isn't acceptable to many people.