I played enhancement on the ptr and I liked it. Didn't have any mana problems health pool is wonderful and I like the new glyph for shamanistic rage.
I was dueling and doing bg's and was doing great without enchants and gems but the lag was so bad on the ptr that I couldn't really enjoy it all.
Searing flame is going to suck so hard. I see what blizzard was thinking since we're going to be focused on single target damage a lot more in dungeons but the idea is flawed and once again after many complaints and suggestions blizz ignores us and enhancement will fail again on movement based fights with hard switches.
Oh and ghost wolf indoors was nice.
So yeah looks like I'll be doing arena as ele and everything else as enhancement.
Enhancement gets a 7 out of 10 like i said before shaman is always right on the cusp between bad and good as a class. Good just enough.