It does look like there is only one latch located at about the same height on the door as the previous design and they've just lowered the location of the handle. I'm a bit concerned that the new design may direct the pressure from the latch on a narrower area of the seal compared to the previous design.
The only hybrid I'm aware of that has a latch mechanism that applies pressure to the seal at both the top and bottom of the bunk doors is the Keystone Passport Expandable.
Here's a link to a video by RV Wholesalers that shows their bunk latches.
2011 Passport Express 235EXP Travel Trailer Camper at RVWholesalers.com 411444 - Havana - YouTube
I looked at the Passports before buying my Roo and felt the interior build quality wasn't as good as the Roo. I don't know if the Passport's latch design provides a better seal than the Roo/Shamrock though.
2011 Rockwood Signature Ultra Lite 8293SS, 12K Equal-i-zer
2016 Ford F-250 XLT SuperCrew, 6.2L, 4x4, 6'9" bed, 3.73
2010 Rockwood Roo 23SS (2012 - 2014)
2009 Ford F-150 XLT SuperCrew, 5.4L, 4x4, 5'6" bed (2012 - 2016)