It's a very long list of changes from aesthetics to options to ergonomics. None other than rider comfort are critical or deal-breakers IMO. You are going to hear a lot of testimonials about slipper clutches, abs, and a bunch of little "marketing" type changes to suck in trade-ins, but give/take, just find one you like, get a good price and ride it. All that other little sh!t is nice but is not enough to break any deal. Just make sure you are getting what you want in ergonomics, like foot placement.
Forward, mids, or a crotch rocket style set-up with the R model. Sounds like you want forward controls from your choices which is all models except the D and R. Both had short 2-year runs and both had changes after the first year. 4 different choices and the rest were the same way, it's hard to even remember all the changes. From rakes to tire sizes, tank sizes, bars aesthetics, etc! Nothing major among them though.