cj driver- what do you then say the purpose of giving you a clearance to destination is in europe. i mean if they didn't consider lost com u would only recieve your SID clearance and then any further onward clearance as you proceed.
there are set procedures laid out for dealing with lost com and if u are being radar vectored you should rejoin your fpl after 7 mins in europe.
I have never been vectored around half of europe as you put it. what often does happen in the absence of traffic is the controller would clear you direct to a point at the boundary of his airspace (to make it more direct). they however clear you direct to a point that is on you Filed flight plan so that you would rejoin you flight plan after the point.
when ever you get radar vectors like you mentioned it is usually about 10deg right/left due traffic this would hardly constitue "around half of europe"