I'm happy they stuck with the foam filter until they could figure out a proper clamping cage for the flat filter (I've had slide-in filters on Yamaha XTs and SRXs and they leave something to be desired).
Once you get the lunchbox out of the way the airbox itself is deceptively large. Two issues present themselves - the new tank has more overhang making it a little difficult to seat the filter, and there are myriad sharp plastic edges to nibble at your wrists and forearms. OK, a third - the screws on the battery box can be a little difficult if the clearance features in the bodywork aren't lined up correctly.
The good news is that there are no longer ribs on the seat to dig into and tear the top of the filter and the box itself seems bigger - no CDI in residence. You also get a set of Twin Air vents to put in the box side if you so desire.
Hopefully Mark gets the cross-brace/seat tab pieces in soon - I think you can remove the filter with that in place.