The increasing gap between players and bosses.

The gap between a funded player who spent nx and a funded player who didnt will not change much with unlimited (simply because flames arent a nx item, it will still be easy for the funded player to get it compared to others, but its not pure nx), the only that changes into a nx thingie is the inner ability. Knowing how nexon america LOOOOOOOOOOOVES to make items that is hard to obtain accessable with money, I can see your frustatration on this situation. Things like tyrant belt should've never come from anywhere but hot time lucky reward or killing the boss itself.

Expecting flames to appear in cash shop tho, so my argument is probably going to be useless.

why would flames appear in the cash shop...? The only one I would see being possibly related to nx to get is the 150 flame, which is useless to most players except for the ones with tyrant, meaning that they are already willing to pay out of the butt for this game.
That being said, we'll see what happens with the player gap with AO's and flaming gear.