I don't really mind either way to be honest.
I can see the benefits, like having more frequent rewards for the levels, but it's still the same amount of work, so really not a big deal. The only thing is I think it's going to feel a bit strange when we reach triple digits, level 105 or 110 would just feel odd to say out loud, I guess that's another benefit.
I think the moment we started expansions in groups of 5 lvls it had a strange ring to it. 10 was good and proper and at a time meant 2 levels of talents
LFR Saved "Single Player PVE that had enough of dungeons" WoW.
There, I said it.