Use auto cruise control all the time in the car. What’s not to like? Not sure about on a bike, but it would allow you to relax a little more on motorway stints....so probs great for commuters. But for me, I would stick to the standard cruise control unless it offered serious advantages. I use cruise on the bikes all the time for the boring bits.
Regarding the new model - I’ll say it’s going to be brilliant with the lower CofG. I knew it would be on the 790 and imagine it will be equally noticeable on the bigger machine.
However! I do love a V4. A Multistrada with a V4....that’s a potent weapon and serious competition to a great many bikes on the market and not just adventure bikes I suspect. However, the 1290 is the go-to for 2 up touring and unless the Multi gets more roomy it’ll still be too cramped for 2 on board trips. Unless you’re a pair of hobbits. You do see pillion’s on a Multi, but I always think they look squished on the back seat.