Well Dave , I think its all about the feel of the car in the real life situations you want to cover and you have eloquently listed those in that you have multiple driving situations you want Monty to perform well in and to me your driving reports say you have achieved what you set out to do. I'm sure you wouldn't sacrifice any of those to excel in any one area, I know I wouldn't. It takes me back to my younger days and a friend who had a Mexico mk1 escort, he messed around with it claiming performance gains here and there, lightening the flywheel for a faster response until he pushed it too far and it had that Ferrari problem of not idling well or even at all and gear change rev drop so drastic that you lost all power. He took it into the local RS centre and cutting a long story short they sorted it out. When he picked it up the mech gave him the keys ignoring all his tech questions and said.... just try it! He came back beaming demanding to know what they had done to make it perfect. They said.. "returned it to stock sir".
Now I know this doesn't reflect your work, clearly you have achieved wonders with Monty and it really has been very very interesting following it all. By accident you started with a fantastic car in that you have one of the five with Peter mulberry's front end and no doubt the rest of the car was pretty well sorted. I have seen your car and you of course perform at the hill climb And I can't see how it could be improved on, it surely must be one of if not the most sorted classic Morgan out there. And never forget, a car showing way less power than another on a rolling road may well outperform it on in real use!