I'm kind of on the fence about this one. Right now things only drop for a certain level range... Want a steadfast protection? No sense in running 50 content. So that would also have to be addressed.
Basically my favorite thing about ESO (the other mmo I know stuff about) is the fact that enemies are level-less. That being said... I don't know how that would translate to the City ecosystem. See, the only instanced missions in ESO are dungeons/trials which are designed for a specific number of players, and solo missions that are so easy you can literally just spam your basic attack key and still win.
City... Is not that way. There are missions that certain characters won't be able to solo at level (my personal favorite example is the psychic clockwork king in Tina Mac's first mission.). There are certain characters who, if solo, their only option is "I'll come back to this mission when enemies are -3 to me". Making the game level-less would remove this strategy.
I do like the idea of level-less and being able to run any content at any level (with the possible exception of TFs/Trials) but I also suspect that would be a massive amount of rework. Every enemy group would need to be viable but not too hard at every level range. That alone seems like a monumental ask.
I do also like the idea of having a better chance to get specific loot, but I really think that without a full-time dev team this is out of reach.