They are two completely different series to compare. If it was playing it safe compared to the MP trilogy, we would've had Donkey Kong Prime (which would be awesome IMO). The fact that Retro came out of their comfort zone to make DKCR, a genre they are not used to and a platformer that is different from Nintendo's other 2D platformers, should really say something.
It is playing it safe when compared to DKCR, but I don't see that being a bad thing. Most sequels play it safe for the most part.







