The borrowed power system is feast and famine for me.
I like getting new toys each expo, that can arguably expand my class in greater ways than simply giving me new abilities. I also get that you just can’t keep adding stuff endlessly because of bloat. But having an expo where I get nothing (no new class stuff nor BP systems) would disappoint me. Scenery is cool and all, but expos need to offer more than locations, that’s patch stuff to me.
On the other hand it really sucks to lose stuff when it does change how you play fundementally or really makes the play “feel right”. A good example now is Havoc when you have lots of Furious Gaze traits. This just works so well with Demonic it feels like they’re together, but they’re not. And when SL hits I lose that. I also lose my Hour of Reaping SBs when tanking, my Fiery Brand utility through Revel in Pain, as well as Vision of Perfection procs.
Yeah, they’re “buffs” but my point is it is frustrating having to reacquaint myself with a class each expo because this stuff really changes how you approach them. It’ll be the same in SL with Conduits and Covenants. I’ll get used to playing with say Elysian Decree/Sinful Brand/Fuel/The Hunt and whatever conduits I pick and my play will feel good around that, but then in 2 years it’s gone again.
It’d be kinda cool if some of it stuck around, and you could pick and mix from these systems but not use all of them at once. Admittedly balance would be horrendous though. They’d also need to be reworked into a pervasive system (like talents, but not actually talents) that sits outside resources specific to an expo.
Something like Legacy Powers. During a current expo it’s same as current. But when that expo ends, the systems become part of the Legacy Powers tabs (in reworked forms where needed, ie Essences become passives or actives in their own right, not tied to an item). Say you have X amount of Legacy points, and activating certain parts commits certain amounts of points. Allowing you to stick with those you enjoyed most over time. There may need to be certain restrictions like you can only commit to one legacy set at a time (ie if spending in BFA Legacy you can only commit points there, you can’t combine Legion passives with BFA stuff). Would be really tricky to balance and ensure no messy combos, but nice from an RPG point of view.