Blizzard has known about this for a while, but the issue with Nature's Grace and the soft +haste cap isn't easily fixable without impacting both Restoration and Starfire (where the NG proc is still useful), and the +crit cap is the effect of unintended stat inflation in Wrath. Enter Zarhym on Wednesday to announce news of a possible change to the Earth and Moon talent in a future mini-patch, granting 2/4/6% spell damage to the moonkin, up from 1/2/3%. While this isn't set in stone (and Balance players are already aware that an overhaul to the Nature's Grace issue probably won't happen until the Cataclysm content patch at the earliest), it's been greeted as a decent short-term fix. It's also a means of improving the scaling of what remains the moonkin's best stat (+spellpower).
Zarhym did warn that the change may not go through in this form, and we're also waiting for news on when this mini-patch will hit. Stay tuned for future announcements.