Is there a way to undo my skill spec points without despecializing and losing the points?
Currently no, but have a quick read from another topic that may answer your follow-up questions.
Thank you very much. I guess for now just despec and re spec. That or make a new guy and level quickly
You can very easily re-level a spell in Arena.
In waves 100+ for examples you get it to 20 in just a few waves.