Patch 1.7 is no indication that Dawnguard will be coming anytime soon. I'd tend to think Bethesda only released it, to keep the hounds at bay so to speak. They've a major FAIL in customer relations and expectations happening right now. So they decide to throw the kids a bauble with some half finished features they had originally cut out in the first place like arrow kill cams that kick into effect even when the enemy AI goes in to kite mode, and the arrow misses. This time around we get mounted horse combat, where many of your one handed weapons can't even reach the enemy, and the bushes are literally sprouting out from the ground underfoot while you ride along waving your sword in the air. But many still lick up these sad leavings, and say 'Progress!"
The 1.7 patch, (really 1.6 if you campare it to the other platforms, no DLC tags are in it) has done NOTHING to improve the stabilzation of the game. This is a necessity if the game is to have any chance of handling the extra memory management required by new DLC features and content. In fact it has re-activated the whole lag issue. All you need do is log into the troubleshooting forums for the PS3 right here, in Beth's own forums, and read the feedback They are sliding backwards, not forwards.... and thats a very sorry state of affairs.
At this point, if Bethesda has a honest solution, it seems very unlikely it will be with our current game discs in play. The question is, do they really want to start afresh and do the job right for a GOTY edition or are they just going to take a few more months and give us some more half-assed patches that barely make this one DLC work at all. I'm for letting them take all the time they need to do the Skyrim DLC job right for the Ps3, but I'm sensing we've got a lot of impatience, both here, and at Betheda Corp. So perhaps DLC never happens for the PS3 because.... they'd rather move on to more lucrative ventures.
So heres the diversion scenario. Stall for now, (it's what they currently are doing, and most of us know it) then in 3 months, Bethesda announces a new "Sparkly" that gamers will quickly fall all over themselves talking about, making Skyrim and its Ps3 failures a lost issue. For laughs I'll call it { [FALLOUT IV - The Overlords ] with a projected release date of 12/13/13 (Friday the 13th). And so the cycle repeats itself all over again.... Worried about the PS3 version? Don't,, they'll be giving it plenty of attention