Tom Doak,
On the contrary, I think Flynn got a bit repetitive when it comes to bunkering his par 3s where he often had a single bunker at green height on one side and multiple bunkers below the green on the opposite side.
Flynn also liked to include a hole concept like the 12th at Pine Valley (which he built and likely assisted in the design details, though the concept was Crump). His variations included using topography or water instead of bunkering and was found at Boca Raton North and South, Cherry Hills, Cleveland Heights, Denver CC, Glen View Club, Huntingdon Valley, Indian Creek, Lancaster CC (NLE), Merion East, Philadelphia Country, Plymouth CC, Rolling Green, Sunnybrook, TCC Brookline, TCC Pepper Pike, USNA and Yorktown CC River Course.
There are two other aspect of Flynn's designs that I would consider repetitive. That would be how innovative they were and How great they remain today. Flynn's innovations include construction (Indian Creek and Cascades are just two of many outstanding and poorly understood examples) agronomy and turf, use of perspective, naturalism, interplays of slope on greens rather than contours and shot testing.