I’ve seen crazy suggestions for nerfing this ability, and frankly, I think its unwarranted (Clickbait title 101), but if it is really necessary, I believe that instead of changing the duration, cooldown, or other whatnots, why not add a sixth ability, similar to other transforms, which allow one to break out of the form. Chuck it on with a 2.5 second rooted cast time etc, and it may help people to peel for allies who have been Moa’d in PVP teamfights.
Just my 2 cents.