I’m not sure it has to be framed as borrowed power. It tends to be a term that’s viewed negatively, even though tier set bonuses are technically also borrowed power - and people like those.
Regardless,
Yes. Something is needed. It’s absurd to play what’s essentially a roleplaying game, but the sense of character progression is all but absent. The only thing WoW has is the gear progression, but it’s not really character progression because it’s tied to the content difficulty, so it’s really more of a difficulty progression where the game gives you the corresponding gear you need.
And if you look at practically any other game that has only a whiff of roleplaying to it, they all have character progression that is way better than what WoW has. And it works. It’s what people are actually excited by. It’s what invigorates people to play the games. The prospect of what you can do and what you can become is the core attraction of roleplaying game design.
WoW has pretty solid character progression throughout its leveling journey, and it’s almost a sin, because the game presents itself in one way - new talent points, constant gear upgrades, new spells and abilities - and then you hit maximum level and it all comes to a standstill and the game turns into something completely different. There are no more talents, no new spells or abilities, and very few gear upgrades. How’s that the same WoW you were playing just before? It isn’t.
Blizzard has to figure out a way to implement meaningful character progression into WoW beyond the leveling journey.
Having an endgame that is completely barren outside of the difficulty progression ladder simply doesnt work. That does not make for an attractive, exciting, or compelling game experience.
Personally I’d like to see the gear progression enhanced considerably. It has been simplified over the years to the point of being so bland that it may as well not exist.
I also feel like it’s perplexing that WoW - the roleplaying game where you get by far the most spells and abilities to play with - doesn’t actually offer any kind of progression in that area at maximum level. You get new spells and abilities all throughout the leveling journey, but the moment you hit max level it comes to a complete stop and you’re stuck with the toolkit you’ve got for the entire length of the expansion.
Other games have all sorts of ways to progress your spells and abilities with enhancements, power-ups, upgrades, evolutions, and so forth. WoW has nothing, absolutely nothing.
I would say that the lack of real character progression at endgame, is in the top 3 of reasons why WoW is not an appetizing game for many, for long.