Hey Dave,
I think out loud, forum fun really. Nice to get input from others.
I can tell you that the Swing arm cut isn't necessary, the wheelbase is fine. The rake and trail is what gives a visual "key" that there will be a riding problem.
I don't need to ride it to tell that it will turn slow, better than a stock S40, which I have ridden....but still, slow.
I've easily owned, ridden over 100 different bikes. Mid 50s, to mid 2000s. currently own maybe 9 (depending on how you count carcasses) I've built several hybrids, different engine, forks, mods...you name it.
Over analyze? yup. leave well enough alone, not usually, ruin stuff? sometimes. Have fun, all the time!

Here is a Benelli Mojave, Honda powered that is a daily driver for me.