https://www.youtube.com/watch?v=Sf45pjT5ILY#t=1h1m30s - Proof that the only right way to play the game is with attack reaction on.
I can answer the question about the retro outfits at least. You can edit the savegame to get them unlocked (it's actually possible to do the same thing with the Agent. If you look at the leaderboards, you might spot a few people already using him), and if you do so, the retro outfits use the same loadout as costume 1 and 2. The retro costumes are referred to as costume 3 by the game.
I prefer the final boss fights for Leon and Chris (but I still thought Jake's final boss was cool). For optimal enjoyment of Leon's final boss (which has five forms in Ch. 5), know that for the second form, there's a climbing segment where you have to hold one button and then tap the other, and then alternate. Actually, it's the same climbing you saw at the end of Jake's chapter. Leon's boss was a long fight -- some say excessively so -- but I loved it. Each form was so cool and it felt epic fighting each of them up close and personal.
NOW FOR MERCS TALK:
Steel Beast finally clicked for me in Mercs last night; originally it was my least favorite map, but now I'm really digging it. I think Sherry Ex. 1 (the schoolgirl outfit) is my favorite character: the shotty is usually a one-hit kill, the Bear Commander is great as a machine gun and also has a grenade launcher alternate fire, and then you have two red herbs for mixing (provided you find the green herbs!) and some incendiary grenades. Plus, Sherry is leggy and runs so fast (or at least looks that way), which makes tracking each Time Bonus so much fun.
NOW FOR SOME DLC TALK:
They needed to release extra maps, like, yesterday. I want the preorder maps (Catacomb, Rail Yard and High Seas Fortress). I also wonder how they'll release the other four (Requiem for War, Rooftop Mission, Creature Workshop and Liquid Fire). I -also- wonder how long the timed 360 exclusivity for Siege, Survivor and Predator modes will work. And when will Ada be patched for co-op, and how will that work exactly, given the grapple points and other parts that seem more suited for one-player? And I wonder if Agent (Ada's supposed co-op partner) will be made available for Mercs? Is it true he has some of the takedown moves of the other characters, and if so, why ones? And as for the Retro skins, do they have their own unique loadouts? I wonder when they'll be available?
SO MANY QUESTIONS!
I can answer the question about the retro outfits at least. You can edit the savegame to get them unlocked (it's actually possible to do the same thing with the Agent. If you look at the leaderboards, you might spot a few people already using him), and if you do so, the retro outfits use the same loadout as costume 1 and 2. The retro costumes are referred to as costume 3 by the game.