I think the high entry level is one of the good things about Re-Volt. In my opinion, this is the reason why we all still play this game. The high difficulty keep the game interesting, and you can improve by learning the tracks and the cars. I play the game since it's release, and I still can see that I improve every time I do offline or online races. When I rejoined the community after an absence of about 15 years I was last on every online race. There were so much hard tracks which I didn't know, and I was frustrated sometimes. But after some time I begun to recognize the tracks with all it's corners, and I was able to finish at positions in the middle.
If I am in the mood for relaxing races, I choose an easy to drive car - like Harvester. Nearly every track can be done without issues when the car is easy to control. If I am in the mood for some challenge, I choose Pest Control. There is nothing compared to the feeling reaching a good position on a track with low grip driving a RWD car.

This is what makes Re-Volt so fun for me.
If all the tracks were easy and too wide, I am sure most people were not here anymore. If you played my Spa-Volts, you can see what kinds of tracks I like, and which kind of tracks I want to see in the future.
Regarding the amount of players: I am one of those who think 12 players are perfect. 16 player races are pretty much chaos most of the time, and the game experience is totally different. But to be honest, this is a point which I am also pretty relaxed about. I also have no problem with 16 player lobbies.
I think the track-selection at I/O races is pretty good. Whenever Bonus tracks will be raced (for example at Whitedooms sessions), it's clearly visible that most of this tracks don't have the same quality than the tracks from the main pack. However, I would like to see some of the harder tracks from the bonus pack in the main pack, because this would bring some more variety to the sessions. (Chilled to the Bone, Cake,...)
The thing which bugs me most when playing online at the moment: The hate and whining. This is also the reason why I am not around so often anymore. I am not sure why this happened, but one year ago the situation was by far not that extreme as it is now. It reached a point, where I am not able to have fun at Re-Volt sessions anymore. I am pretty sad about this, and I really hope that this will change sometime again in the future.