oldfart, I have been suffering getting the cockpit setup on my hartail and last night I rotated the bars forward half an inch or so, all of a sudden it just felt right, and the numb hand I was getting all the time went away (old injury).
If you have risers its a free thing to have a play with.
I am not 100% convinced on the shorter stem is good rule of thumb that seems the norm these days, not sugesting going back to massive stems but, maybe its not always right.
If you want harpack tyres that can cut it when its a bit softer, and your on a budget check out specialized fast traks, theyre kinda like a small block 8 but half the price, light, big volume and do supprisingly well out of their designed enviroment… (mud tyres they are not though) Dont bother with over a 2.0 they come up huge compared to other makes.
edit… was it you talking about the setup between hartail and full suss the other day? Have you measured the difference between the two?