I personally think wild strike is fine as a rage dump when at excessive rage, but i do think that the bloodsurge proc could be better. Heres what i think blizz should do with the proc.
Bloodsurge: Bloodthirst has a 20% chance to cause your next Wildstrike to strike 2 times, Cost no rage and also proc enrage.
edit: i actually thought i put this but i meant this ^