I would not order one. Current Apex engine produces plenty of power for me. As much as I would love to take something like that for a rip I wouldn't spend the kind of money that sled would cost. A low milage used Apex is the best value in snowmobiling IMO.
If Yamaha were in a different position (all their models are way over due for updates) it would be fun to see what they could build for a current top of the market sled as you describe but what they need is something that appeals to more of the masses. They need to sell thousands of a unit not hundreds.
My guess on their new offering is that the new sled is based off of an updated lighter weight Phazer chassis with a hotter 1049 engine and a more traditional looking front end than the current Phazer and a variable riding position. Updated multi function and color gauges, LED and projector lights. 143hp and weighing 525 lbs great great for ditch, groomed trail, off-trail, and mountain with longer track option.