Buying gold via tokens won't give people the option to skip content. What on earth are you on about? There are so few BoEs you can actually buy in Classic, that buying gold have as good as zero impact.
Sure you can get your epic mount faster - doesn't affect anyone else. And lets be real, if you're not close to 1k gold by the time you hit 60, you're doing it wrong.
Yes there are some BoEs that are rather strong (Annhiliator, Nightfall, LH, Hide, Corehound from the top of my head), but again - doesn't really affect anyone if you take a shortcut to obtain those either. Two of them are only good for raiding aswell.
T1 bracers and belts from MC is soon to be replaced in BWL, and tbh there is dungeon gear that is stronger (yey 1.12 patch).
HOW does it DESTROY what Classic stands for? If anything, releasing it at patch 1.12 did a LOT more damage than adding tokens will. It's a reason MC was a complete utter joke that was cleared in questing greens and at lower levels than 60.
Token is in no way, shape or form, anything like LFR.