Okay ... Okay, so I haven't finished Crysis yet, but ... well, I feel the need to rant anyway. So ... let's see.
The gameplay is ... weird. I'm not sure how to best explain this.
The way the suit works is quite different from Crysis. I think I already complained about everything requiring energy, which significantly slows down the gameplay. Unfortunately, it also means that you'll often end up in annoying catch-22 situations where getting to a place where you can safely recharge suit energy, requires you to use either stealth or armor ... which is why you need energy in the first place. Often, you're forced to slowly creep from one hiding place to another, stealth-killing enemies, before skulking off to the next. So much for guns. As far as shooting goes, you're usually best off hiding someplace far away and taking potshots at enemies, rather than hit-and-run tactics as the game actually encourages.
I mean, the way I imagined the suit would be used, would be using stealth to outmanoeuvre your enemies, then attack them from an unexpected angle using armor mode. Do that, though, and you're just going to end up dead when their friends come to help and your suit is recharging. The usefulness of stealth is also limited by the time it takes for it to activate, the fact enemies will occasionally get a lucky hit even when you're stealthed, and their ability to see you if you get too close.
The weapons themselves, are for the most part ... ridiculously weak. Aliens in particular are just ...
Yeah, don't get me started on the aliens. These enemies are just plain silly, not intimidating in the very least. Their appearance is stupid, like less threatening versions of the Halo Hunters, and ... you know, if there was just a few of them, but those few were incredibly dangerous, I might find them more intimidating. But, no. They just take a lot of damage, unless you can surprise them. To make it even worse, the game encourages you to kill as many of them as possible, because you need to harvest their remains for suit upgrades ... yeah, I just ... ugh.
And about the aliens and their place in the story ... how are these even the aliens from the first game? I mean, aside from the octopus-imagery, they have nothing in common. I guess that's not so weird, considering they basically rewrote the whole story of the first game. And not for the better, mind you. Seriously, this did not need to be a sequel. If not for the suits, there would be absolutely no connection to the first game. And the story as a whole is weak, predictable and filled with clichés. Unless I'm coming up on some mind-bending twist, I imagine it'll stay that way.
So, in conclusion, is it a bad game? Well, no, I'm still playing it, so it's not that bad. The only game I can think of comparing it to, is FEAR 2. In fact, they have a lot in common. Both Crysis 2 and FEAR 2 are sequels whose prequels were way better. Both are made for consoles. Both evolved the original concept in, ah, roughly the same way. The settings are similar. The main characters are similar. The stories are similar ( not the details, but the delivery ) ... yeah.
Anyway, rant over. I'm going to play some more, and ... ugh, hope it gets better.
Edit: Well, I ran into some human enemies, and ... the difference is overwhelming. I got my hands on some expensive suit upgrades, and ... this is more like how the suit should've worked right from the start, and this is how enemies should feel. So. If they'd made the aliens more terrifying ( as in, made fighting them something you wanted to avoid, not something you absolutely had to do in order to get stronger ), the game would've worked way, way better.