In early access where level 2 spell slots did all your damage as a druid, if really was downright useless. Either barkskin needs to be level 1 or Level 2, but require no concentration. Aside from buffing AC by 2 instead of setting it to 16.
If Barkskin raised AC by 2 without concentration until long rest it would be quite useful. That extra AC would also potentially help hold concentration on other spells when attacked.
