I think the OP is asking whether he should stick with what he is comfortable - the Big Agnes solo tent - or try something new that may nor may not be to his liking. Why not try a hybrid tent. The SMD Skyscape Trekker is an excellent solo tarp-tent, as is the tarp tent strato spire 1, the SMD lunar solo, the TT contrail, etc. For a few more dollars, the Hexamid tent with beak and screen would be another option.
I think you might find you like tarps with 360 protection, like a MLD DuoMid or Golite SL3. You'll get 360 walls with the option of views, and you can add a net and ground sheet as you see fit. For reference my SkyScape Trekker was 23.5 ounces, a duomid weighs about 18 plus 8 more for a net inner, but it's WAY roomy for one.
I'd try to break free of the double-walled modern tent design criteria (inner, fly, footprint) and start using a single wall tent and a groundsheet as your floor. This doesn't feel much different than a regular tent when you're inside, and you can move to a less-protective flat tarp as weather and your comfort level allows.