The 2010 16-footer is efficient. Nothing is wasted. It can't be. And it appears to be one of the few (or only?) shorter-length models with a panoramic rear window, which is GREAT! (starting at 19' you lose the pano due to corner shower stall).
There's a bed for sleeping; a dinette for eating/working; but what's noticeably lacking is the CHILLIN' section. I don't find the dinette seating comfortable for reading/laptopping/etc.
So I unbolted the right-side dinette bench with storage drawer underneath, and removed the table. Then purchased a La-Z-Boy Harbortown model -- it's currently the smallest in the La-Z-Boy recliner lineup. I was worried there still wouldn't be enough room for it in an already small trailer, but with table/bench removed, that corner opens up, and accommodates it beautifully. There appears to be more space in the 16' now (this may change when I build a table, but if constructed carefully, with the right shape and dimensions, it could be good... the stock table was fairly large). The angle of the chair back follows the angled interior of the Airstream. The entry door is not blocked. The subwoofer located in that corner (mounted on floor, behind the chair) stays where it is, fits perfectly as-is, no relocation needed. Took the trailer to the store and brought the chair inside it before buying, just to make sure.
I'll make a plywood custom "skinny" dinette table that serves as table for both the bench seat and the La-Z-Boy. It will also accomodate a small ham radio transceiver and Morse code paddles -- fortunately the location of the chair and table will suit a right-handed op well. Comfy operating position.
Downsides: You do lose the bed from the dinette-to-bed conversion, but you can also recline/sleep in the La-Z-boy. In fact I bet it's more comfy. Went for fabric instead of leather - had it in stock, much cheaper, plenty durable, no worries. Also, you lose the draw of storage that was under the bench seat. There's still some room to the left of the chair, and with a carefully designed custom plywood table, you could build some storage space into its base.
The chair is fairly light. It seems roughly the same as the table plus bench/drawer that it replaced. I'd guess 65 to 70 lbs. I will have to add back the weight of the custom plywood table, but shouldn't be too bad.
First glimpse (literally... in the La-Z-Boy parking lot) - still work to be done (secure it to the floor, hopefully using existing screw holes, and build the side table), but this gives you the idea.
Learning to live with only 16 feet, and making the most of it.