DC is dead in the water, IMO. Its too broad of a brand to offer a 'subscription only' based model, especially after 20 retail waves full of the characters people know of. While I applaud them for keeping it alive as long as they could, I'm surprised it lasted as long as it did.
I collected DC Universe when it started, and while I didn't like every figure, I usually got a whole wave to complete the CNC, which were really good characters in the beginning, i.e. Metamorpho, Grundy, Metallo, etc. But take away the CNC, and there's no way I'm buying half of those figures I did.
I would totally do a Batman only sub, or buy figures like both Doomsdays, but Batzarro, Fire&Ice, Starman, those god-awful Rainbow Lanterns are things I'm not going to buy just to be able to get a Ras Al Ghul. I never subbed for DCIE, but did buy a few figures here and there. At least with MOTUC I have a general idea of who to expect, i.e. 6 vintage figures, 3 POP, 1 NA, 1 200x, 1 concept character. But with DC being so vast, there's no way to even guess as to who you're going to get, besides at 12 characters that at some point have been in a DC comic the past 50 years.
I think for collector action figures in the 6" scale to be economically feasible in the future, with rising costs and whatnot, then something like the 4H's kickstarter is going to be the way the industry moves to. Retail outlets don't want to sell action figures anymore, and the costs are getting too high to justify the current business method of producing these things.