My two cents on the rules: Leave out post-treaty designs. Someone could draw the most beautiful LNT2-design in the most brilliant way with the perfect backstory and would still lose against a limitless max-out-Überbattleship drawn by my 6-year old son. I'd set the deadline prior to the call of the escalator clause.
Second, concerning Springsharp:
Garlic, you have my utmost respect, but you're wrong on both counts.
As per my reply to JSB, entries are judged in comparison with their counterparts in reality. So uber BBs will have no advantage, only disadvantages in feasibility scoring, against other contestants!
Secondly, for the SS report, you haven't adjusted the protected area to be the correct size; You're simulating it at 65% of total waterline length, when it should be ~51.5%. You also haven't simulated the tapered belt, which I have (adding more weight)
https://pastebin.com/qBvzmjHH
SS gives Iowa correctly simulated as 0.97.
So I hope this clears things up, thanks!