Agree that these sources of advantage are unnecessary for the game, and trivialize getting advantage.
Other ways of getting advantage in this game require some kind of investment. E,g, tricksters current channel divinity, costs an action, a channel divinity use and requires concentration. It's AWFUL. Faerie fire - costs a spell slot, concentration, and the enemy gets the make a saving throw against it. Barbarians reckless attack - doesn't cost an action, but it gives the enemy advantage to attack them back.
Right now there are some situations where the players start off in terrible positions.. but from level 3 as a wizard you can have your wizard misty step up behind all the archers on the ledge and thunderwave them off in one round. Sure that's really cool the first time you do that, but it will get old quick.
