Don't see any problems with it being an import, just when you come to sell up I'd expect there to be a price differential between an import and a UK sold model.
Yep Pug Assist is RAC, I guess RAC may be better experienced with the Pugs as they exclusively have them in the first year.
Dealer said an import wouldn't be mux wiring and there'd be all sorts of problems but when asked couldn't say why. ISTM servicing with mux is just a matter of checking the event log to see what's wrong rather than using conventional mechanical knowledge...
You can check out the UK SE spec from the PDF on their website but sounds like you've got the same as me. I also checked GTC (bought the last car there) but there was no mention of trim on any of them (they seemed to be S model and no leather).
You got a good deal, well done. In my defence (your honour) the garage gave me the same for my trade-in as I'd have got privately. I put it on my Virgin mortgage - another £50 a month. Saving £2k on the import would have saved me £12 a month.
GTC sound much the same as Motorpoint. It was all pretty clinical and a quick "in and out" process. Only problem was missing radio security buttons. They just took them out of another car

Glad I never had to go back to them with any issues though, it could have been grief.