blackbeetle13
Villager
Two things that I personally love are the stacking/subtracting boon and bane mechanics from Shadow of the Demon Lord and a method to expend your advantage for an effect.
So, huge issue with advantage/disadvantage for me is the binary nature of it. Oh, your elf fighter has been blinded, poisoned, and frightened? Don't worry, the bard will play a jaunty tune to negate the disadvantage you have on you. On the fip side, SotDL has a mechanic where you receive positive and negative D6s that cancel each other out. If you have the aforementioned blinded, poisoned, frightened condition and get an advantage granting buff, you've only negated one of those penalties. You would still roll 2d6 and apply the highest as a penalty to your roll. It just allows for a more immersive experience in my opinion.
Also, if I have advantage, it would be nice to have some kind of mechanic that lets me trade that in for a bonus. Maybe the fighter can trade in advantage on an attack roll to both do damage and trigger a disarming effect. The wizard can trade it in on a cantrip attack to knock a target back 10'. The monk could trade it in to give disadvantage on the targets next saving throw. Just a list of options that every class can choose from, with possibly feat or class support that add in specific, more powerful options.
So, huge issue with advantage/disadvantage for me is the binary nature of it. Oh, your elf fighter has been blinded, poisoned, and frightened? Don't worry, the bard will play a jaunty tune to negate the disadvantage you have on you. On the fip side, SotDL has a mechanic where you receive positive and negative D6s that cancel each other out. If you have the aforementioned blinded, poisoned, frightened condition and get an advantage granting buff, you've only negated one of those penalties. You would still roll 2d6 and apply the highest as a penalty to your roll. It just allows for a more immersive experience in my opinion.
Also, if I have advantage, it would be nice to have some kind of mechanic that lets me trade that in for a bonus. Maybe the fighter can trade in advantage on an attack roll to both do damage and trigger a disarming effect. The wizard can trade it in on a cantrip attack to knock a target back 10'. The monk could trade it in to give disadvantage on the targets next saving throw. Just a list of options that every class can choose from, with possibly feat or class support that add in specific, more powerful options.