It will be interesting to see what he will come up with as all of the current podcast apps IMO leave a lot to be desired. Also interesting considering Apple resently released a podcasting app.
Other than a more intuitive grouping/categorizing and less crashing, it'll be interesting to see if anyone can improve on Downcast.
Maybe it's just me, but I consider purchasing Downcast a mistake. Complete lack of subtlety. Annoying noises to refresh and check for new podcasts, by default, seriously?