I have 20 Years of experience watching my brother Play Sonic... thats how difficult it is for me.
The only thing he needed me for was for that one boss fight that can't be done without Miles.
Well they definitely can t change the physical level design so its probably one of those... I doubt they going to change anything about Sonic's jump.
They could change the speed but then players will adapt to that the same way they adapted to it the last time... by memorizing where everything is.