I think Ultraswede & Jerry pretty much summed it up!

The Rushmore's came out with numerous improvements over previous models like my 2012 CVO. I don't particularly care for water cooling, but applaud Moco for developing a compact & stylish system, and not just hanging a big radiator ifo the engine. I think this foray into water cooled (with exception to the Vrod), will be ending in 2017 with the new platform. So another bastard child by Moco, perhaps.
I love the style of the trunk and latches of the Rushmores (modern but classic). The vent on the fairing, though apparently very effective, isn't particularly appealing, but the newer batwing itself is very stylish.
Basically you have the same engine/displacement (but cooler running), same frame, and same transmission, but hundreds of improvements to the 09 platform. Some of these improvements will undoubtedly carry over to the 2017 platform.
If I got a ridiculous trade in offer and a substantial clearance discount, I would seriously consider it, but I'm not motivated as I'm perfectly happy with the performance and appearance of my current CVO. I have Ohlins front & back so I feel certain it will handle as well if not better than the Rushmore. I like the flexibility of upgrading the motor(S&S)/transmission(baker), suspension & exhaust systems available, should I ever become bored with what I have. A lot cheaper than buying the latest & greatest.
I would be more inclined to see what 2017 touring bikes offer, if I get the itch. The Rushmore have great improvements over my bike but not to the tune of 10-20k, for me. The value of pre-Rushmores (like mine) I believe have dropped significantly, like the pre-09 framed bikes.