We are an German EASA NCC operator (what you Mericans know as Part 91) and we have biggest difficulty with the LBA to get our LVOps up and going.
With NCC you are stuck with 800m VIS for T/O, which is a show stopper often.
Our Sovereign could be equipped to be CAT II able (just a software update) but given my ongoing experience with our authority I doubt it would be ever possible to get and keep it.