I think the use of the word refurbished is over used in regard to the power cars,other than the necessary traction interlock equipment fitted your looking at a bit of paint and sticky back plastic. As jingsmonty has said scotrail have identified several areas that need work,how quickly that can or will be done who knows I've only seen one speedo that was no longer one of the ATP ones.
I think scotrail made the mistake of thinking they were getting power cars that were in good working order and have had to rethink that.
Yes the performance of these hst’s are only slightly dented by these faults (traction motor problems,loss of amps etc) but it's length of time that these take to get sorted that grinds.That said I do feel for fleet as they've had these things dumped on them and unfortunately for the most part they've been sold a pup.