While preventing abuse is good and all what I'd like to see sooner with regards to the proposal system is better filtering and display of proposals.
Currently it's a bit of a pain to view proposals and search through them by catagory or something.
Perhaps a proposal should be made to standardise how proposals should be made and also add a way to categorise them. Like I donno Hive, 3rd party app, Mainteance cost. etc.
Alternativly come up with a recommended standard for tags to help with finding proposals you are interested in.
I guess this is more of a front end issue, that could be solved relatively easily with a standard on proposals.