The Key item:
This is honestly the most boring part of this whole process, going to get 10 kills on EP mobs every time is very tedious. I don't really have any suggestion on how to improve this without causing more congestion but it is annoying (for instance allowing 4 KI to be stored was an idea I had but that would cause issues with players spamming to enter over and over). Maybe changing the target mobs on a daily rotation might help the monotony, going to kill the same mobs over and over, day after day is part of the problem.
The Ambuscade dungeon:
The basic placeholder dungeon should change every month. I know it's classed as legion content and the devs like things to be kept ordered according to the lore but considering how much of this we are going to be doing this it's getting boring. mamook dungeon rooms, aydewa all exist.
I guess this won't change due to them being incredibly strict with the lore and different tile sets not making sense but a change really would liven it up a bit. Maybe they could write a little text to explain how someone from another region wanted help too and came to get our help with it...or something.
Jade sepulcher single dungeons tileset example:
https://www.youtube.com/watch?v=fLZWtOGYVLg
The reward NPC:
Can the NPC to trade items / get rewards from either be put away from the Ambuscade entrace NPC or clones put in starter cities? FFXI players love standing afk at these npcs and trading 20+ times in that situation is incredibly annoying.
The rewards:
The armor is great, pretty much all the rewards are.
The capes however should have a way to rename them, maybe add an npc to +1, +2 capes so that you can actually have multiples and then be able to macro them in without using 3rd party programs. If I want a TP cape and a WS cape, I can't because they are all called the same thing and macros won't work in that situation.
Abdhaljs Seal (triple reward boosters):
Put these on login campaigns, make it a 2k (3k?) item that's sendable on the same account. It encourages people to get more alts, adds a greatly in-demand item to login-campaigns and lessens the very long grind a little.
Feel free to add more if you can think of anything to improve it, I'm sure the devs are looking for suggestions on how to improve this content since they are going to be working on a it long time.