I noticed this trend increasing in episode 9 (using camera angles so that there was very little animation and extensive use of still frames). Like Zetsubo, I suspect lousy outsourcing. I'm beginning to wonder if they specifically assign Shinbo to handle projects with a high expectation of failure from outsourcing animation during broadcast
(argh, budget sucks.. send Shinbo's team in to "artify" it and we'll fix it in the DVD products)
They DO usually fix it (my Moon Phase DVDs are much nicer than the broadcast duct tape), but it *is* annoying.