Agree with what everyone else has said about the composition. Mosaics are not hard, I have done a number in Pixinsight and once you get your head around the process, it works very easily.
That said the individual component look great with lots of nice intetesting detail.
Also, although I am not a fan of popular names for objects, much preferring proper catalogue definitions, I note that your thread title refers to the Prawn Nebula which is IC 4628 and you have imaged NGC6357, sometimes known as the Lobster nebula. Both excellent crustaceans but different objects
Malcolm