I got to the final boss last night and gave up after a few tries. We'll see if I power through it or just walk away for good.
NMH2 is better than the first game, but it's really just more of the same. I love the 8-bit mini-games, but they don't fit well into the game design since money is useless after the early chapters. The last few assassination levels seem lazy, with several incredibly long kill rooms and a mind-numbing motorcycle stage.