recently my character got hit by a poison gas. The disadvantage was applied to all my attack rolls in the encounter. The encounter was AC 8. I had a +7 to hit. So when i rolled to attack, I had to either roll a 2 or better in one die roll, or roll a 2 or better in two die rolls. If I had been a halfling, I would get to reroll the possibility of a 1.
While statistically, i could have rolled a 1 on my disadvantage, I didn't. Therefore, the disadvantage had absolutely no impact on my attacks. Meanwhile, if i had a -2 penalty, or a -4 penalty, for instance, my probability to miss would have tripled or worse.
I still play Pathfinder and it can get crazy with bonuses. Flanking, bless, prone enemy, higher ground, cover, aid, dazzled, etc. I was forever asking people if they remembered bard song and buff table tents were common. Paizo even sells a deck of Buff cards.
I agree, it was messy and confusing.... and yet....
...I really do like the idea that I get a bonus for taking the effort to seek higher ground. But if I'm already blessed, and I get only one advantage, then why bother to also seek higher ground? I did like how everything mattered. It made you think more about strategy, and it's what makes me bring out the miniatures and dungeon tiles.
So I'm on the fence. I appreciate how 5th edition tries to solve this problem. And yet I regret that all that strategy is now basically watered down to just a single bonus for everything.
recently my character got hit by a poison gas. The disadvantage was applied to all my attack rolls in the encounter. The encounter was AC 8. I had a +7 to hit. So when i rolled to attack, I had to either roll a 2 or better in one die roll, or roll a 2 or better in two die rolls. If I had been a halfling, I would get to reroll the possibility of a 1.
While statistically, i could have rolled a 1 on my disadvantage, I didn't. Therefore, the disadvantage had absolutely no impact on my attacks. Meanwhile, if i had a -2 penalty, or a -4 penalty, for instance, my probability to miss would have tripled or worse.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.