As far as I can tell, Beast form in late game is a joke, anything with a 2 handed can take you out in 2-3 hits, enemy archer can rip your face off because you are basically naked without any form of damage mitigation

The fear howl has no effect on enemy beyond lvl 25

The +100 health bonus in beast form is bugged and doesn't seem to work at all.

The damage from its claws is pathetic compared to the weapon upgrade offered by smithing, the max damage is 80 when you are lvl 46, while most weapons at this lvl are looking at 150

basically you cant kill enemy fast enough before getting yourself killed due to low damage and no armor, you may stand a chance in 1vs1 with power attack, but more than one and you are screwed.

The only benefit is the 100% disease resistance

The lack of damage mitigation/resistance is really something Beth should look into, beast form is no longer viable in late game because it dies way to quickly compared to human form.

Even at mid game my human form w/ armor / weapons was much stronger.

I guess it is WAD, that's why I haven't used my beast form since level 20 or so.

But i guess if i wasn't a sneak player, it would still have it's uses. For example you can pretty much kill any civilian in broad daylight and run away without giving away your identity if you had to do an assassination mission.