It is difficult to see the replies you've gotten as a texter at a glance. It is also difficult to go back and find an interesting conversation. Often, as a texter, you'll want to handle a certain type of reply first (e.g. "yes, I'll vote. Where's my polling place??") but the only way to go through replies is one by one.
An inbox display organized by campaign that shows all the conversations, a preview of the most recent message, and their state (open, handled, bookmarked*, ..., etc)