There yet may be bloody hope for this.
I reran a test with just NYGM's model and noticed the same behavior on the surface. (IE, loss in top speed because the boat was trimmed down and heavier) Purely out of accident i ran it at flank speed for a couple hours under TC, and something happened.
The boat picked up top speed and behaved as normal again.
I then reran a test with both mods combined.
The top speed was restored after about a couple hours!: up:
Im quite happy about that. This has the potential for maximum coolness.. Im running a few more tests to test what i beleive is neutral boyancy after a "trim dive" is in fact nuetural boyancy, as well as stand still behavior after going that deep.