Have to disagree with you on echoes - I loved the game, but IMO it was much easier than Prime 1 - the most difficult boss was the probably the boost guardian midway through rather than any of the endgame bosses. The ammo system made the standard power beam too centralising which was boring, and the dark world damage just served to slow the player down, since the light fields regenerated your health.
Arkham Knight is decent except for the batmobile sections - as others have already mentioned.
I’d still argue it’s better than Origins though. From memory, memorising all the different toolbelt skills isn’t really necessary - you can definitely get through the game by just abusing jumps, cloak and counters - some special enemies might need a specific ability to make vulnerable, but the game normally warns you the first time you fight them, so I don’t think it ever feels too overwhelming - it just feels like a lot if you run through it very quickly.