Damn, saw this gif on reddit regarding the effect of recovery:
https://gfycat.com/consideratespiritedflea
Really shows how dramatic the difference is. Seems like about 5 seconds difference between 1 and 10, or a full half second per point. Waiting 5 extra seconds every time you take damage sounds torturous. Really need to make sure my titan and hunter have as much recovery as possible...
The Prestige Raid sets alleviate some this burden
They come installed with a Mod of the ability the lack most in (iirc, or on the piece)
Like Warlock gets more Mobility/Resilience
Titan more Mobility/Recovery
Hunter more Resilience/Recovery
Also that's why people are chasing sets, there's a reason certain sets cater to an ability.
I think Hunter who lacks the hardest in Recovery has a recovery set on Io or Titan, not sure
Then you can add mods if you get to add more Recovery
So there's thing there to balance, but a mess to work out properly with certain things blocking you from doing so