Update: Regeneratin' has finally seen a change on the PTR
https://ptr.wowhead.com/spell=291944/regeneratin
The change was the channel duration was changed from 4 seconds to 6 (pre-haste). The 100% heal and 90 second cooldown remains unchanged, still on the Nature spell school if kicked. So each tick is a little over 16% instead of 25%
This might be the final iteration as 8.1.5 is launching soonish. Was personally expecting the CD to go up to 3 minutes or the heal values halved, but this will stay appealing for those looking to race change for it. Even just one tick is enough to keep you alive in mythic raiding, and on a 90 sec cd. Remains to be seen if it breaks on absorbed damage with this build, as some reported it was doing that before.