The HYBRID idea is great for keeping a large move around idea inside the trailer without having the beds to worry about. The FOLD DOWN Tent beds from the outside really is plus in this regard.
The only drawback some folks have is the large doors that fold down are prone to slightly warp being as large as they are and may not be as water tight as one would expect. The earlier HYBRIDS definitely had these problems...
Being a tent trailer camper couple now for many years we can report we have no issues whatsoever with keeping our OFF-ROAD POPUP trailer comfortable inside as far as temperature is concerned. Actually the propane furnace is way too hot for us to use - runs us out. Also way to loud to live with as well hehe... We tend to use portable oil-filled electric heaters more and just have the propane furnace and loud blower as a backup source of heat. Keep a low 40s setting on it.
Another thing we have done with the little ones. It seems the older kids would rather setup outside in a tent so we will always have a tent available when the grandkids are with us.
Roy Ken