There is a significant interest in letting elected officials represent their constituents as they see fit. And so I don't think that any effort that would limit how many bills a lawmaker could introduce or that sort of thing would necessarily get very far.
I think the future is going to look a lot like the past. Virginia muddles through with relatively short legislative sessions, and if lawmakers introduce too many bills for the legislature to consider, the ones that aren't going to pass anyway are thrown overboard.