Sorry for the delay in answering your question, but I do have some good news for you! Cards can now be customized via the Layout Options screen :) Give it a try and let us know what you think!
As for our roadmap, we do not list our roadmap anywhere publicly. We work in an agile environment and new features are often reprioritized or sometimes canceled altogether if it isn't working out, so we don't want to promise anyone that we are working on something if we can't guarantee it will happen. We can give hints about what we are working on or considering, but we try to avoid anything more than that.
We do have a beta community that lets you get early access to the features we are working on in exchange for providing your feedback on those features. Would you be interested in joining?
/Jacquelyn - Podio