Look at the different colours of the stars coming out in your shots! (I know it's not "right" for the purists, but out of focus shots can be used to better show the different star colours

)
As Mike says, we'd like to see more exposure.
Your Crux shot just doesn't extend to the Omega Centauri globular cluster - just off the top of the frame, I think. I'd like to see how that looks when you get the focus more precise and can increase the exposure.
Thanks for posting.