I read the link to the Yamaha Canada site and the biggest takeaway I found is that it states the bike is supplied with iridium spark plugs!
None of the other Yamaha sites talk about horse power, only torque is mentioned, presumably because if you are a REAL adventurer then you know that torque is king and hp is just bragging rights. My thoughts are that Yamaha fear falling too far behind the others in the ever increasing hp battle that all the other manufacturers are concerning themselves with and are studiously ignoring the hp figure. Yamaha could hardly fanfare that for the 5th year in a row the engine (indeed the entire bike) is essentially unchanged. For me this is no biggy. I like the performance and see no need for "more", but there are others who believe, rightly, in incremental upgrades and see this as merely stagnation of the formula.
I think at some point Yamaha are going to have to do a major revamp though. They need to improve the breed and attract new buyers. I've already got mine, so they're not selling to me and they are so reliable that I'm not going to replace it for the sake of a new colour scheme. Existing owners will only get the new model if it has some must-have features over the current bike. This doesn't.