Not all Airline op's are in tightly controlled airspace, but I definately get your point about appropriate systems being used.
When somebody goes for a bimble to the local area on a gin clear day, will advanced systems be of any help? Not really and they may well distract from the primary business in hand.
This sort of kit obviously lends itself to long distance IFR operations rather than day VFR stuff and that to get the best from it takes a lot of study, look at how much time is taken up with the avionics on most jet type-ratings, surely something like a DA-40/42 with the 1000 fit needs something similar?
The aircraft itself I would have thought is fairly easy to handle, yes it's quick-ish, but it's no pocket rocket so getting 'checked out' on it shouldn't be too difficult from a handling point of view, but driving all the spangly bits may take some time. How big will the manual be?
I know having all this kit is wonderful, but isn't it a bit of overkill? Considering how often most people actually operate their a/c how long would it take for most people to forget the finer points of the avionics.
K.I.S.S. (Keep It Simple Stupid) for the 'average' weekend flyer, hopefully you can dial back some of the more advanced features when you don't require them (a la 73 NG).
Mind you, once you've got used to EFIS, it is hard to go back to steam!