I'm inclined to adjust the criteria for this SOTMR to this:
Space for 1+
Trekking pole supported
Double-wall or hybrid single/double
Supports are not in the middle of the sheltered space
Light enough for solo use"
I think your criteria is excellent. No suggestions for improvement from me.
The Sea to Summit Specialist looks like a good shelter to include IMO. The 37" wide Duo version looks like a joke, but the 27" wide solo shelter at 15.6oz sounds like a nice competitor to the LG Solong and the SMD Skyscape. I'd include it if you can. The SOTMR would be stronger for it.
Let's try to narrow it down some between the 1P and 2P versions."
I'd say go with whatever is likely to be the most popular option/version and fits your above criteria. Then just quickly mention the other options in the review and/or just include them in the comparison table but don't do detailed reviews. In general, I think 1 person or 1+ person is going to be more interesting due to a wider range of designs that aren't always available in 2P (ie. SMD Skyscape) and even when they are (ie. HMG Echo II), they're really more suited for 1+ person use because of a lack of headroom.

