I agree with a lot of the points on this. I bought Ninja Gaiden 2 a couple of days back and am currently wearing my arse as a hat because it's damn tougher than its predecessor. I played noticing a few features that I quite likes (larger levels, fewer invisible walls (but not entirely gone), a bow that wasn't completely useless except for the arbitrary "use bow here!" boss battles, more water running) but a lot of things I didn't like turned up.
For one thing, those fucking ghost pirhanas, my single least favourite enemies in the first game, including bosses.
But, like the first, I was finding it fun despite the challenges. The ninja dogs were cheap and I agree, but I felt like fucking Kratos (not in a gay way) the first time I was able to breeze through a mob with only minimal injuries (which came from one that had been stuck running into a bit of fallen tree and so I had to finish it off seperately from its freinds - it still managed to get a few blows in with its mouth sword, those things are freaking fast) and when I beat a Venice street full of purple beasties and those weird amphibious sword-snake things without even taking a single hit, I was higher than if I'd injected Pete Dohertys blood into my veins (without the risk of AIDS, too)
As for the story.. well, I freely admit that though I love Mass Effect, Bioshock and other well written games, and am leaning towards a "games are art" hippiness, I didn't buy this for a story. I bought this to run along a wall, whip out a sword and cut off three heads in one slash, and the game lets me do that, and looks damn pretty doing so. This game is about style, not substance.
As for the cheapness.. yes, I did begin to notice fairly quickly that of the ranged weapons, incindiary shuriken is ridiculously broken and you only really NEED to use the bow on certain bosses and flying enemies. I didn't find melee weapons quite as broken, I feel they're more balanced (but then I'm writing this from only a partial experience of the game on one difficulty setting so my stance may change on this) but the Oblivion techniques get quite samey after a while. It tends to be with most weapons the same "off with leg then off with head" animation, with only one in a few dozen being anything else. Come on, Team Ninja, this just looks lazy! You could at least put a few more animations in.
This first NG game was a classic, no doubt, but it wasn't without its gripes. Its platform bits were quite irritating (especially the section where you're running up the inside of the tower with zombie archers firing at you) and the second one feels a bit more intuitive with them. The levels are larger and feel much more open, and the combat is fun, if frustrating in places. I find the bosses irritating (what the hell was that burned gorrila thing on the bridge?) and they tend to be my least favourite fights of the lot in the whole series, and currently NG2 sits in my console, saved just before a boss battle that killed me the first time I tried it but I'll probably head down now this topic reminded me about the game.
Ta-ra, I'm off to get brutally savaged by a glowing pleiosaur.