I just actually read the OP as i only responded based on the title. But it doesn't look like you understand what you want? Aren't you basically saying you wanted Gaara to have been involved in more fights? If yes, i agree with you. But character wise, he was done. His story/backstory was complete. We even got a sequel about his backstory in the war arc with his dad (which was awesome).They were not incorrect I still go by them. I truly feel Gaara was wasted. The guy was put on the shelf most of part 2. I wanted more of Gaara. You fanboys will never understand this.
Orr
If i'm to get it right, does this: "His tailed beast was taken away from him which made any potential he had as a charactered wasted. Kishi basically put his character on the sidelines doing paperwork for ages." mean you wanted Gaara to still be a homicidal maniac just with more utilization of his tailed beast?