Have never owned a BA tent, though bought one with the Copper Spur design years ago, and returned it because it exceeded the spec weight considerably. They have a new one out with this design that is very light. Sorry to hear about the complaints relating to leakage and durability.
Guessing that you want what you say you want, and as light as possible without sacrificing function and durability. Was wondering why you did not consider a larger Nemo Tent, like the Dagger. You might also look at the Tarptent Bowfin 2, spec’d as a free standing double wall. The Trekkertent Phreeranger is a similar design, but you’d need to contact them to get full specs, and would have to order well ahead.
Then there are the current offerings from the larger companies, like Marmot, Mtn Hardwear, Sierra Designs and MSR, that you can review on line, and probably be able to see in person at larger outfitting stores in your locale. Hope this is helpful.