3.0.1 Elemental PvP Specs?Follow

Long time reader/first time poster, etc.

Anyways, just wanted to see if anyone new if spending 51 points in elemental was worth it to get Thunderstrike, or if everyone was still using the 40/0/21 elemental build for 5v5 arenas?

Thunderstrike seems pretty good to me. By 'good', I mean it can interrupt, gains 5% mana back, does a decent amount of AoE damage and is instant speed with only a 45 second cooldown. The only draw back is losing Nature's Swiftness as well as the other restoration talents. It also could be fun and useful in BG's to knock people of high cliffs, like in Arathi Basin by the Lumber Mill flag or the EOTS flag.

I haven't done a lot of testing in arenas yet, so I just wanted to know if anyone out there had an opinion on the matter?