I cannot comment on the native podcast app at WP 8 at it is unavailable to me as well as any other user outside the US. However, the best podcast clients listed on the marketplace are good but not up to the functionality of their counterparts on iOS or Android. In part because of the limitations of Windows Phone OS but also because they aren't as madure as some of the options available on those platforms. As such, a podcast app provided by Microsoft is very welcomed, especially if it includes international users. Even if it is not as feature full as I would like, it will certainly work as an incentive to the other app developers to step up their game.