Looking at all 4 articles again, barring Order Adept and Guardian, I think they are pretty well balanced. Guttersnipe level 5 feature is kind of campaign dependent as to how powerful or weak it will be, and Animal Master requires some DM mercy, but in general I like all the themes both mechanically and for flavor.
Order Adept's features, and Guardian's Counter may need some attention to power them down to the level of other themes. Particularly Guardian's Counter seems too powerful to me, especially for heroic levels.