I'm also on my third season with the Mojo HD. It's an awesome bike and while the latest improvements on the HDR aren't enough of a reason to upgrade, I do think that they give it the edge over the current Nomad C (although I suspect SC will upgrade the Nomad soon enough). But really they're both great and you'll probably love either one.
Consensus among my crew (a couple of us have Mojos, one other has a Nomad C) is that the Mojo has slightly better pedaling dynamics while the Nomad has a slightly more cushy mini-DH bike feel. Both can rip on the downhill regardless, both can climb quite well. One thing I like about the DW-Link on the Mojo is that I no longer feel the need to run any platform on my shock. Get the air pressure right in the can and then just forget about it. My experience with SC VPP (on a Blur LT) is that a little platform for climbing is nice.
I run a 160/120 Talas on mine and it climbs like a goat with the fork dropped. In 160mm, I can climb pretty much anything but the steepest walls although that does require me to get a aggressive over the bars given my 50mm stem. I've heard similar things about the Nomad.
Some interesting points about the seat angle… hasn't been an issue for me but I'm 5'9" running a medium so I probably don't get much of the angle pushing the saddle back. I could see it being an issue if you're tall or on an undersized frame.