I do something similar, but I don't solder the wires. Have had decent luck doing it that way over the years.
I've always been told that soldered wires inside a crimp will fracture sooner than a bare wire crimped, and also conduct heat faster.
This subject has been debated for ages and will probably be debated long after I am gone. Another thing I've seen done that works but doesn't look as neat is to splice 2 wires into 1 wire, heat shrink it, and then strip the end of the single wire, and crimp a connector to the single bare wire.
