Basically 100% agreeing with Mithgroth
.
Maybe change GW glyph so that it grants the ability of using it indoors, and making the snare reduction baseline instead? After all, the indoors aspect is much more situational than the snare reduction.
In instances/raids you only use it for running back to the boss after a wipe (and sometimes during encounters, noted).
In pvp it comes only handy in for example wsg bases and alterac bunkers. In arena that aspect is completely worthless.
It's basically a nerf to baseline shaman pve utility, but a buff to baseline shaman pvp utility.
And even if one now said "But it is totally needed during encounters, cant pass that up!", pve is also just another "situational" aspect of the game :P.
I dont think any pve'er would ever take that glyph unless it became minor though (or the encounter requiring LOTS of movement).
And I like your idea of adding snare/root break to UF:FB, Mithgroth. Would solve a lot of problems (though we'd still be pidgeon-holed into taking it).
Your point about ret being in the same as us w/o their HoF is also right on the spot.