I could never see WotC going for that kind of use of the inspiration mechanic. Be better off going for alternative templates and/or feat support.I fully agree if the goal had only been to make a tankable wildshape. However my self healing boost suggestion was also intended to cover the complaint that there is nothing good to use spell-slots on. Barkskin with its duration, and for this purpose useless upcasting do not fill this purpose.
(And the inspiration suggestion was not to improve tank at all, but rather a light weight mean to give mechanical meaning to some flavor the players might want from the shape - like deception of chosing a shape to blend in, intimidate if going for something ferocious, or perception if using something for heighten senses)