The mini-skid isn't necessarily a bad idea, because it does open the game up to more 'tiers' of players. You have players who don't skid at all, player's who skid, players who mini-skid, and player's who snake. So there's more immediately obvious depth than the earlier games.
The mini-skid and snaking was made easier with the d-pad IMO, but both MK64 and MKDD had snaking of some sort as well, though. It was also more noticed because of the competition online.
I can snake fairly well in MKDS, but not well enough to get near some of the crazier lap times online. In that sense, i preferred how in MK64 i could keep pace with the best times by mastering the subtlety of mini-skids more easily than mastering 100% course snaking in MKDS.
MK64 (despite the haters) had subtlety in it's mini-skidding (timing the left/right pushes to keep the best line, and straightening up your character on an exit, among others).
But, SMK had some incredibly subtle depth masked in pure simplicity, and simplicity is best. MKDD was totally disapointing to me because they just added too much to the formula.
I doubt we'll ever see the series go completely to it's roots again, but i do think perhaps the mini-skid system has become overused now - they need something new, hopefully the wiimote can create some different control method.