Good idea to rent a Class C and try it for a short trip. And it will have more room then a Class B.
That being said, I do know a couple that downsized from a Dynasty after many, many years and miles of travel - to a Class C Lazy Daze. They're very happy with their choice, and feel it was a better quality then other Class C's that they looked at.
We do have friends that went from a 36' Bounder (Due to age of rig, non slide.) to a Winnebago Class B Via. They took on trip with their old toad, and realized it was just too much weight for the Via. So now have a Honda FIT, that still gives them some concerns at times. Enough so, that they've started taking trips and having to rent a care in a location for getting out and about. They quickly found un-hooking and packing things away from a campground or RV Park to go to town, museum, sight seeing - whatever, got old real quick... They said they're 're-thinking' their Via, and maybe going back to a 32-36' DP so they can take their toad again. (And he said something about 'tight quarters' too. They stopped a few times to spend the a few nights in hotels
!)
An an observation, your 36' is sure not a big RV
! (But happy wife, happy life...).
I did kind of chuckle, as I'm trying to talk my DW into going up 2' to 42'
!
That being said, longer range, we do expect to downsize too. We've been watching the Foretravel IC-37, and Newmar's New Aire. We did go thru the 33', which for such a small package was done very nicely layout and livability wise. I prefer Jake Compression, and the 6.7 is Exhaust. The new year brings a 35' New Aire, with the ISL and I believe Jake Compression... So, we'll keep an eye on these units over the years.
Best to you,
Smitty