Many thanks Podair, I'll try to reach out to the three of them.
Chris, I'm no expert on maintenance (yet, ownership will likely change that), but have looked a little into the N-reg vs EASA, and I udnerstand the following. Apart from the IR argument it is also much more flexible and somewhat cheaper to maintain an N-reg than EASA. Most importantly you don't have any freelance mechanics under EASA, you need to register the plane with an approved shop who will do all of your maintenance...and I udnerstand some outfits take advantage of their monopoly once you're in the door. As they "own" the paperworks on the plane, you can't just move. Then there are little things like mods not being approved and ADs being mandatory, never optional, etc, etc....so many go for N-reg to have flexibility and control over the maintenance.
The issue is that under EASA, there is little difference between being Mr Jones and being Lufthansa, in terms of maintenance regimes, pilot training, etc. As Podair mentiones, there are signs of improvement though.