Voidmoji
Perpetually Perpetrating Plots & Ploys
4e already has a lot of "add X or Y" where X or Y may be +1 +2 or a stat...
useing advantage would let them stream line some of them...
Take teh warlord (my favorite class) if you had at wills and 1st and 3rd level encounter powers that gave advantage on things(the at wills scale to add a static +1/+2/+3 at 5/11/17), and 1st level daily's that add 1d4 to the rolls and 5th level dailys that add 1d6... witha rule that you can only add 1 die (so no stacking a +1d4 and +1d6 or even 2 +1d4s) and can't stack advantage... BUT you can have advantage +1 +1d6
I don’t like the advantage/disadvantage system of 5e. It’s as simple as that. I’m not hear to crap on anyone’s preferences or fun! But for myself, I wouldn’t buy or run a game where it existed as a replacement for modifiers in general.
My dislike is for much the reason @Undrave pointed out. I like situational modifiers. I feel like they fit with the crunchy nature of 4e tactical combat. I just think they need cleaned up. And I have solutions for that that don’t involve reducing them to a binary state.
I’ve considered using the mechanics of rolling extra d20 for some specific things in my own game, but if that happens it will be rare.