DR cooldown is definitely missed. They technically have a perma 20% in BS, but the lack of IBF is definitely noticeable. However, I think the new VB makes up for it, especially with the Red Thirst talent which effectively reduces its CD to under a minute and the artifacts that increases its healing and hp buff to 50% and the one that puts a shield on you when it expires.
If anything, I can see VB getting a small nerf since it looks to be a bit too good now. 50% more inc heal 50% more HP, 10s duration on ~45-55sCD, adds 5X DoT shield when it expires that can absorb magic damage.
I think it's THE best tank CD in the game with all of those buffs.
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I'd say they do have a higher learning curve since they have more active mitigation, but a week or so practicing in dungeons or leveling up to 110 as one should be more than enough to get you accustomed. Took me like 2 or 3 days.