Television Harry Potter TV series

Id have preferred to see character development and building of major characters like Sirius, Lupin et al.

The issue is, from all the snippets we got, James Potter and Sirius Black were obnoxious pricks for most of their student life.
 
The issue is, from all the snippets we got, James Potter and Sirius Black were obnoxious pricks for most of their student life.
Exactly. So I want to see their development from obnoxious pricks in the last one or two years of school, to then taking the fight to Voldemort with the Order etc., coupled with the world becoming more fearful of this new dark wizard and his cronies. Seeing Snape and Malfoy etc. becoming who they did.