I was playing around as a druid, and i found it pretty annoying that if i morph into a wolf to kill some mobs, the fight takes 10 seconds and then i have to wait for another 40 simply to unmorph and be able to sleep/craft/open chests etc...
So i would suggest that we'd be able to activate the spell again (while on cooldown) to unmorph, and then obviously have to wait the rest of the full cooldown to morph again anyway.
Or, though i find it less desirable, another keybind or spell to unmorph.

I'm also aware that what i'm proposing has some balances implications as well, and if it doesn't fit in your vision of your mod, then that's fine, though it could easily be a config option i'd think.

PS: if it's ok with you and i find time, i might try and patch it myself and put a pull request here, no promises though.