I am very unsure of Enemy Within. I have some minor problems with Enemy Unknown, but I've enjoyed it a lot, and those problems can be forgiven and I can overlook them in favor of a fun game. But everything I'm seeing about Enemy Within just has me thinking I will not like it.
I don't understand why there's suddenly a human enemy faction, and why these pillars of MELD just appear everywhere. X-Com is not hard set in reality, but it just seems strange to have MELD blocks everywhere all of a sudden, is there an explanation for them? And the humans, why add those, I could understand if this was some sort of continuation on the story, and some parts of the world signed up with the aliens and so you now have some human enemies, odd, but I'd get that. However isn't this supposed to just take place during the main story, a rewrite really, so aliens attack Earth, humans fight back, and a small group decides to also cause mayhem. I don't know, until I see a strong reason or something it just puts me off, I'm here to fight these invading pricks, not a group of dumbasses.
Then the genetic modifications seem really strange to me. That's what some of the aliens did, and look how it turned out for them. It's an option, I get that, and it could be kind of cool, but part of what was interesting about X-Com was the soldiers were just humans fighting aliens, some of which were genetically modified in what was generally referred to as an icky thing, and now we can just do it too. Then the idea of just taking a soldier hacking off their perfectly working limbs so you can add robotic limbs to them, that just seems really screwed up. I would totally be on board with the idea that if you had a gravely wounded soldier you'd have the option to speed up their recovery but grafting robotics to them and get them back onto the field that much faster. But this sounds like taking fully functioning soldiers and hacking them up, ew.
And I'm just worried these advances in your soldiers will just make things that much easier. I'm having some trouble on Classic, but normal has become so easy for me I find it boring. I mean, they give you the option of having a guy in a walking battle suit who can seemingly kill almost every enemy type with one punch, and has a crap load of HP, just seems over powered. Do the enemies get that much stronger? I think I've only heard of two new enemies, one being a sectoid in a mech suit? I doubt anything is going to be that much harder than a sectopod.