No, the age stuff is just stupid. No one is going to grow colored eyes, for example. It is just a weird concept that is likely going to hurt the settings of future Sonic games. They should have just never allowed them to alter this kind of stuff.
Sonic Heroes was the first game where he was 15, they also changed Knuckles to 16, when he was originally 15 instead. They never planned this, it is a subject that should have never been discussed in the games. They should have focused on something like why if Knuckles likes grapes so much, he has never eaten any in any physical media? At least that does not give any kind of ammo to ruin the fanbase further.
It will not effect the games... Probably, but it is seriously going to hurt the fanbase. I have been around them for awhile and I know what kinds of things they latch onto, this will be one of the biggest yet.