I understand that, but I would of thought having a consistent UI would of been something they would of strived for from the get-go and not over the course of its life.

None at all, go ahead and install it.

You do get that he was asking for positive thoughts, right?

Services packs are still a thing?

See http://imgur.com/a/ekRHU to understand what I mean.

I was hoping these issues would of been sorted out in the final release, is this just a byproduct of a single OS being used for both tablet...

Was just a theory. When the PSU is faulty it can cause all manors of instability, including the symptoms stated by the OP.

You didn't tell us the brand of your PSU. Sounds more of a hardware issue if I'm honest, especially after a fresh install.