I think your build is interesting and I have more questions than answers because:
- you sacrifice a lot of agi to max haste
- conventional wisdom says primary stat in current patch is waaaaaaay more valuable than secondaries; agi scaling with WF and stormstrike is very good
- I question this conventional wisdom because I was playing with a twink priest yesterday who prioritizes haste until 20% at expense of the rest and kicks major ass
- Comparing enhance sham to any type of priest isn't apples to apples though -- stronger classes can get away with unconventional a lot more easily
- Enhance Shaman have (very!) limited tools now without frostshock, purge, grounding totem -- on top of that maelstrom is a bitch - not much room for error or to recover from mistakes (no defensive cooldowns); so to mitigate our real strength (bursty DPS) in order to auto attack faster and decrease the GCD -- unsure how it will feel - because by the time I atually get into melee range I am already at 80% health
- is getting auto attack weapon speed from 2.6 to 2.2 noticeable? worth sacrificing burst damage for? (unsure) might noticeably help with maelstrom starvation and free SS procs but I am skeptical.
- is lowering GCD to 1.1 worth it? (unsure) but we have so many buttons to push and are a reactive class so it might be.
- does lowering damage on WF and SS damage matter? (unsure) Part of the fun of enhance is big numbers and your build will have smaller but faster numbers -- maybe that is just as fun?
kudos for creativity! would love to hear how you like it.