I'm in the same boat, really wanting a 2015 11" MBA to go with my 2015 13" MBP, but ultimately I decided on fixing up a 12" Latitude 7280 I got from e-waste (looked to be water damaged, keyboard was unreliable and battery would die at 40%). So far it's been pretty great, and will likely entirely replace my MBP while also being more convenient to carry around.
I'm in the same boat, really wanting a 2015 11" MBA to go with my 2015 13" MBP, but ultimately I decided on fixing up a 12" Latitude 7280 I got from e-waste (looked to be water damaged, keyboard was unreliable and battery would die at 40%). So far it's been pretty great, and will likely entirely replace my MBP while also being more convenient to carry around.