Since Chomp SMS is also created by Delicious Inc., I noticed there are some features from that app that could go well with Textra:

1) allow SMS & MMS backup in Textra.
2) give us the option to include contact pictures next to messages.

Now for some other features I'd like to see not included in Textra (or Chomp):

3) the option to archive messages
4) group pics together that are sent in one MMS message