Way I see it, I'm sort of desensitized at this point to DLC being for aesthetics; color changes, different outfits, and all that. If it's something that doesn't affect gameplay and is optional (can unlock it by playing or buy DLC), I'm fine with that.
It gets to a slippery slope with me when they do optional with in-game stuff. Even if cheap now, it worries me for the future if companies find this stuff really catches on.
I don't know yet how easy or hard it is to get a silencer and crosshair in TR yet, but making it buyable if it's something that can be gotten in the middle of the SP campaign, that's strange to me. If it's easy to get for most, it's making me wonder what kind of gamers are there now that are having trouble getting it that companies would feel the need to offer that.
(rant)
If anything DLC could've (should've) been better, more difficult tombs.
(/rant)