Looks pretty good! The pointy deltoids look a little strange. The figure seems to have a lot of surface sinks (the infraspinatus area in pic 2 for example) which look odd.
You can't control how things are triangulated in maya without actually connecting those edges. In this case I would probably connect them as tri to form the point of the spike correctly, because at export to game you don't really get a choice to lock in the tri direction any other way, and you might get those edges being…