I commonly use Vrykul Drinking Horn with Mr. Smite's Brass Compass to make my character awkwardly huge in confined spaces. However, this has a similar effect to mounts that the camera offset gets thrown off.

Since these are buffs (just like mounts ultimately are) I was wondering if we'd be able to whitelist non-mount buffs that we want to check for... Or, even better, if we could use non-mount buffs to scale the existing values since some buffs persist while mounted.

Thanks for the hint regarding these buffs. You are totally right.
Once I find the time I want to allow for a custom offset factor for every player-model-affecting buff.