IMHO, Maya is the best player in the league 'without the ball':
1) She turns bad passes and loose balls into retained possessions rather than turnovers.
2) She corrals mediocre passes--and even some bad passes--and turns them into buckets.
3) Due to her great hands and exceptional athleticism, she gives her teammates a HUGE effective target zone, way over and above the normal 6-foot player's target zone.
4) When sealing defenders (usually guards or wings 6-ft and under), she has perfect timing on the catch, always keeps the ball very high, and finishes quickly.
5) When paired with a good passer--one who is aware of what Maya is doing and where she is on the floor--she creates scoring opportunities that would not even exist for most players, let alone getting converted. These include things like crazy alley-oops out of nowhere in traffic; sprint-outs on the break where she not only gets behind the D but then catches and convert buckets even at a full-out run, etc.
So to me, it is not surprising that she isn't mistaken for Marques Haynes with the ball in most situations. That's because she is pretty much the world's best at moving and making an impact 'without the ball' and has done this her whole career. It would be unusual, I think, to find someone who is truly great in both respects, because greatness in many ways requires a certain focus. Maya is gradually shoring up her ball-handling skills and will continue to develop these skills going forward.