without Unrestricted Customization when I upgrade the armor to predator it ruined the outfit and cosmetics mods.
What can I do to bypass this changes?

Iridar's Appearance Manager and, more recently, Project Dollhouse are the only other two big appearance-managing mods that I'm aware of. The former is included with the mod pack already, and the latter is so new I don't have any experience with it yet. Not sure if it's even compatible, but could be worth a read of its mod page to see if it would fit the bill.

(may also be worth asking in the Discord, way more activity there)

Since this states not to use Unrestricted Customization Redux is anyone aware of an alternative that allows for hiding some of the more hideous armours while retaining customisation options?

The pools are actually in the pack already! Right-click the Season 9 Tweaks mod in AML, click Show in Explorer, and check the CharacterPool folder. They should be bundled in there.

I'm curious if there is a way to get the character pool uploaded to the workshop, if not understandable.

...and it's out! Commenting to follow.