No they shouldn't. Why? Because games like Firefall exist on the PC. Bungie's flipper child isn't going to play well with genuine sharks in the water. There's far more direct competition and many of those (besides having a better core design) use a much more reasonable business model than "full priced retail and THEN relatively expensive DLC packs (particularly for a format with access to Steam)." Lets put it this way, Halo CE made sense to have on the PC because there were things that format genuinely offered (ex. online play) and in turn there were things that Halo offered to the PC market (ex. a strong narrative told through convincing in-game cinematics). Destiny on the other hand can only hope to gain a slightly larger market share while at the same time offering only a very backwards view on both MMO and FPS mechanics and gameplay. It would be a very cynical release at the very least.