I actually really enjoyed that first episode and can't wait to watch it again with the script. The obvious things to think about are the characterisation, especially of new characters we haven't met before, and the pace. What does RTD do to ensure the brisk pace?
Another exercise would be to turn the script into a treatment to look at the structure. Keeping the scene headings, write what actually goes on each scene. I think that's a good way of seeing how he deals with the various story strands.