First off, I don't like the idea of giving 25 man raids better loot and uncoupling the lockouts. I think that goes too far in terms of setting 25 man raids on a pedestal. Believe it or not, what I personally want is a system where if you prefer 10 man raids, you can do them, and if you prefer 25 man raids, you can do them. It may not be possible for both raid sizes to be equally viable, but making it so you can run 10's and 25's on separate lockouts and then putting the better loot in 25's just cements 10's as the also-run raid size. Now, if you put better loot in 25's but keep the lockouts shared between them, the relative ease of organizing 10's and running them would balance that out to some extent, but I actually prefer the idea of separating the lockouts but not giving 25's better loot.