Would love this feature!
More personalization in Tower Unite via customising your own character is always a great & well needed addition in my eyes & my friends eyes.
Nice way to show to everyone your experience on Catsacks, With 10's of millions of Units already spent on them by the community, Be it Cosmic/Gold/Silver/Normal, everyone would be able to show of how much they have spent &/or how lucky they have gotten!
As far as replacing the current Jetpack as a whole, luckily it is really really cheap for its value & i know for most people, the refunded amount will just be some spare change in their pocket. Not much to worry about there.
Maybe we'll see this sneak into a patch notes one day