Pros:
I think that the main pros of this course are the huge variety of shots, distances, and challenges for differently skilled players. As I note below, this is also one of the challenges of the course as there are several holes which are inappropriate for both the upper and lower ends of the skill spectrum. There is a really great balance in this layout between 'righty' and 'lefty' favored holes (I count only a very slight advantage for southpaws). Likewise, holes range from a tricky little 88' hole that averaged over 3 strokes per competitor to the huge 596' par 4 opening hole. Additionally, temp courses offer the opportunity to experiment with really, really fun crazy holes that you'd never be able to or perhaps want design on a real course. This year along with the 88 footer, featured a really fun island hole which throws into permanent seating for a small outdoor ampitheatre. Quirky, tough and punishing - would I want one on my home course (or at a National Championship)? Probably not - but perfect for a small temporary course and ice bowl tournament! I rarely have as much fun playing disc golf as at a temp course, you get a feel for someone's idea of design, get to play holes and shots you've never played before, and have the comraderie that comes with everyone talking strategy and figuring out a new layout together.
Cons:
The main cons for this course have to do with the temporary nature of it. As with all temporary courses, the holes have to be constructed out of available obstacles and there is little or no potential to make modifications. The result is tee placements that are less than ideal and several holes which have low variability in scoring curves. A great example is hole 9 which, at 391' and uphill really only gives the biggest of arms a shot at a '2'. The hole is lined on the left side by an OB line and on the right with thick pines and brush - missing to either side will result in a nearly certain '4'. However, the fairway is wide enough that no pro players will be likely to miss it (unless they slip on the tee) and even average shots will yield less than 100' to the green which is only semi protected. A pro player on this tee will feel little anxiety about the outcome, knowing that unless a serious blunder is made, no strokes will be gained or lost on the field. Looking at newer amateur throwers who are clearing between 260-300' on an average drive though and this hole becomes really nice with a nice accurate drive and approach needed for birdie. Another drawback to some of the holes on the course in general are the little, nearly invisible branches on holes like 8 and 10. Sure, shots that hit these off the tee probably aren't 'perfect' but don't deserve the punishment knockdown from hidden branches. A final con of this park in general is the overall saturation of the ground throughout the winter. Even with more permanent tees and fairways, lots of careful study would be needed to avoid the wettest areas.
Other Thoughts:
Like other reviewers have stated, there is tremendous potential at Seward Park pending a careful balance of wildlife areas, multiuse areas, and general environmental impact. I would feel pretty confident in saying that with careful planning, a good nine that meets these criteria is out there!