Time for a pretty epically large post post, we'll see how this one goes. I was gonna make a thread as this is less of a wishlist and more of a suggestion or a "can it even be done?" post.
Seeding, or the values given when the editor randomly generates something. Eh, I don't know the actual term and what they actually mean, but I'll explain it a bit more. If anyone has played some of the Worms games on DS or console you may remember that they have a level generator. When it generates a level it reads out a code in numbers that represents the random generation of that particular level. You can also input the code later to get the exact same level later on. It would be really nice to have this feature for the course maker for a couple of reasons. Find a nice terrain layout you like? Well you could save it or you could keep the code for it and use it later for the track you wanted, you could also post the code here or send it to friends so they wouldn't even need to download the track from your profile. This would solve the problem of having only one slot to share tracks.
Another idea would be for the generator to only randomize the terrain, then just let us draw roads across the top of it. I think this might be possible as the logics are already in place for the creator to be able to run the tracks across whatever terrain. That would be nice but I doubt it will happen anyway...
Some other things apart from full day/night on all tracks and weather options on all tracks as well would be...
The ability to chose dirt or tarmac on all courses. I'd love to drive some race cars on an Alaska Track or Leige but I don't want to drive on dirt or snow even though the layout is fine. Just swapping in a tarmac texture and properties from the others couldn't be that hard right? I think they could allow us to swap in some dirt on Mt. Aso and Toscana (they have a dirt toscana track already anyhow) I doubt Eifel would work for dirt as that really makes no sense but whatever.
An undo button would be cool as well. For instance, last night I had a good layout but wanted to default the turn sharpness on all seven sectors. Forgetting that doing so would change the layout entirely I changed all of them to 0 at once with L1. I then lost my sweet layout and couldn't find it again, I mean come on there's 7 sectors and 11 positions for the turn sharpness slider in each sector, chances that I stumble upon the one I had before are slim to none.
A simple undo button would have helped me right about there.
Running the tracks in reverse is something that would instantly double what the editor is capable of. I don't know if mirroring them would be possible or not but it's a cool idea.
Oh and tell me someone who disagrees with an "export to XMB" option. This would allow us to transfer them much more easily and allow us to transfer more than one at a time without the need for adding more slots to sharing them on our profile and taking up more space on some of PD's servers. Were this to happen, a GTP file share function for sharing tracks would be awesome.
I still think they need to make good on their promises of point to point tracks and the ability to play them online with friends.