As another non-useless 26yo I will say that flappy paddles are not important to me at all and not the major point to focus on to get more participation. In fact, if they're gonna be cables instead of electric/compressed air I actually kinda prefer stick sequential. Just feels better and it's what I'm most used to. Either way though, whether it's H-pattern, stick sequential, or paddles is a very minor detail and no matter what the car had it would not be what dissuades me from getting into that class. Whatever the car has I'm sure I can drive it. What I look for in racing is
1) What does it cost to get into it?
2) What does it cost to race and be competitive?
3) What kind of competition is there available?
4-car starting grids are not my thing, I want to be going side by side and battling for position from start to finish. Alphabet soup race groups with 2-5 guys per class getting all spread out a couple laps in doesn't seem like a very fun race.
FE seemed like a good idea to me on the surface, I like spec things, but from what I've seen at local races it falls flat in that #3 category. I don't know what the major fault in it is, but I don't see much point in buying a $30k race car to race against 2 other people. Unfortunately the best way to get more participation is... having more participation in the first place. Not very helpful I know.