The 462 will definitely be M-tronic and have spring AV. I doubt that it will have FI. FI is being touted in the carbon fiber 80cc saw but Stihl says that is a limited prototype design, and will not go into production (at least not any time soon). Meanwhile the 462 is being field tested now and is due out next year this time.
I will not be surprised if Stihl drops the 441; that is their oldest design air strato saw still being produced. It was never well received and never sold well. The 440 spanked it in sales. The 461 is a good design and has the next generation engine. The 461 was only intended as a stop-gap saw to tide things over until after the 661 was released. That was recalled and delayed a year, but now fixed (bad cylinders) and back in production. That leaves the 881, and I would predict a 60cc exhaust scavenged saw to follow (the 363). After the 462 is released, the 881 would be the next one on the design block. I think it would be a good FI saw, it already weighs and costs a lot. Pure speculation on my part, but that is how I would do it.
I am tempted to get a 461 if they are lowering the price. It is smoother than the 44o and has the power of the 460. What's not to like? I am not sold on Mtronic yet, and I like tuning carbs with my orange screwgies. AV would be nice, but that would mean Mtronic. Decisions decisions. Husky seems to be stalling on the 372xt replacement. The AV on the 372xt turns me off (the 372xp was a much better saw, IMO). The replacement '572xt' has been field tested for over a year now. Where the fork is it?