Okay, here is a go capturing the king of the globulars. Not sure I have the colour correct, still struggling with Pixinsight. Took me about 3 hours to process this bugger. Ended up just using RGB. 15 x 2min subs for each channel. Other details in the fields at Astrobin.
Omega is very difficult to capture. His core is very bright with many stars very near. I liked your photo. At sky and periphery you did well the colors. The core is very bright and don't show the colors.
There are some old red-yellow stars together with new blue-white stars inside it.