Do you want tails and cream to still have that childish and innocent look in the game?
I do.
Attitude and irrelevant opinions on society aside (no offense), I agree with Bolnichka about the Tails redesign, it's such a drastic change in dynamics and aesthetic.
Though it may not seem like it, the Kabalmystic sonic models are a clear result of artistic oppression from the likes of Furaffinity, and other such places shunning artists from drawing, animating, or making on-model, size accurate representations on the sonic characters because "uNdErAgE bAd".
Changing Tails design in Project X to make him look more mature feels like a slap in the face to those, like Bolnichka, who very much prefer his normal design.
Redeye, Frafro, I suggest, no, I beg of you to refrain from changing Tails too much.