Personally, I hate this kind of DLC, especially when you get it in one of those steam sales/GOTY editions where all DLC is inclusive. One thing I'd really like to see is a DLC loader/unloader, so I can turn XP boost and shit like that off. For example, Sleeping Dogs, bought it last Christmas during a steam sale. Had all the DLC but didn't actually read what all of it was and this version of the game installed it all for me rather than let me install it individually. Basically, after the first missions for cop and triad, I was either max level or had jumped to within a level of max...and the game was 100% easy mode from then on. Then again, driving around in that ridiculous DZS-90 was also easy mode.
Other than that, like cheat codes of the past, I think it should also remove you from the achievements/trophy equation. I honestly felt like I was cheating in Sleeping Dogs, with how easy it became so quickly, so any achievement I got felt hollow..but that's just me, there's no doubt people who don't care about that :) I'd still really like the option of turning that stuff off though.







