As a member of the gaming community, I have come across a large number of discussions concerning DLC, and the vast majority of gamers I've seen online have been very vocal against this idea. The community as a whole doesn't care what the price of the game is--in this case, a game that would normally retail for $60 could be sold for $30 with DLC making up the other $30--they simply will not support a game that feels unfinished.
Ultimately, the gaming community feels (unrealistically) that video game publishers are trying to milk them for all the money they are worth and that DLC that feels like it should have been included on the disc (or that was included on the disc and then unlocked via purchase) is one of the greatest sins conceivable.
Personally, I think that the gaming community is largely built of alarmists and that these changes wouldn't seriously hamper gaming at all (especially if the retail price was lowered), but the community as a whole simply will not stand for this, and any attempts to roll this out in the near future will fail.