Crit is still not important for resto druids. In fact, I think the value of crit has gone down. My reasoning is thus: in 3.0, we cast Regrowth a lot and took advantage of the extremely high crit chance and synergy Nature's Grace to pump out high HPS, so crit was a half-decent stat to stack after reaching sufficient levels of haste.
In 3.1, we mostly avoid casting Regrowth. Furthermore, the way Nature's Grace overclocked the Improved/Glyphed Regrowth spam build has been significantly reduced. We're no longer chaining crits for maximum throughput. Instead, we're maintaining HoTs to maximize Nourish bonuses, and leaning on Rejuvenation a lot more especially with our extremely potent tier-8 4 piece bonus and the conditions in Ulduar. Given this paradigm shift, I think most trees would agree that the share of effective healing done by HoTs that can't crit has gone up, and thus the value of crit has gone down.
For this reason, once my gear brought me over the haste cap, instead of looking at gear that gave me crit, I've now been looking for similarly itemized gear that gives less haste while keeping me over the soft-cap. To give a concrete example,
[Leggings of Lost Love] narrowly edge out
[Leggings of the Lifetender] because they have less budget points spent on haste in return for more on spirit. Though, you may have to sweet talk your cloth-wearing mates to obtain this, as the leather is substantially similar.