Sure thing, I can work on making that option available for the crosshair. You aren't the only one to have asked about disabling the crosshairs so I'm more than happy to add the feature.
I agree that there is not that much feedback when hitting an enemy anywhere apart from the head currently. The animation currently used is too subtle. In general a bunch of "game feel" stuff needs to be worked on really.
Thanks for the feedback and for purchasing this game! :)