I gonna say this as short as I can, so you understand why I, a fan of the serie since I've been 5, that's 16 years for me, I'll explain why I don't want what you are implying.
First lets go back in time, the very very first F-zero. We all remember that game, right? then we bought the N64 version, what did blow our mind away at first? Indeed, Added modes, added charcters, added techs, new handling, new engine, everything was mind blowing. I didn't buy MV, but I would think that people reacted like this: Omg, New cars, new characters, Like f-zero but new techs, almost totaly new gameplay! Those that hasn't gotten the point I'm trying to prove yet, are idiots, so just in case I'll explain more.
Then we got GX, Why did this blow our mind? Well maybe first of new modes yet again, excellent new speeds to reach, and even though snaking is consider a bug, it might aswell been ment, because, that gave us players more choices of how to play it, also new. New characters, you get to know the main character a bit deeper without watching that childish cartoon. And then we got GPL, This game was alot different also, new characters, Yet again, New modes kinda, or atleast improved story mode. Kinda like MV, but still alot different cause they added extra boosts, then the zero tests, so this was new also. CX I haven't bought, but what got me about this game was that it felt alot differense then GPL in many ways, new modes, new boosting system, etc etc.
So you see my point? What I want is they to continue in this way, I don't care if they blow it in the long term, I just want my brain blown away of the suprises they have for us gamers. Don't give me anything like the previus, give me something as new as the others games has been, give me something that will make me longing for the game, making me drowl, making me satified. I can wait 10 years, as long as they blow my head away.
Well that's all, hope you all understand why I, a fan that has loved this serie for more than 3/4 of his life.