Yes they should have addressed the issue. I'm sure they were even working on a fix before the release, but Zenimax or who ever does the PR and Marketing for Elders Scrolls probably forced a premature release. They game was not yet ready for release.
Todd has to promote his game too though. I'm sure they even had him coached on what to say. He can't just say nothing about it. Corporation want control. Control over everything as much as possible. We don't know what really happened behind the scenes with this whole fiasco, and I don't think its fair to point fingers at Todd Howard and the rest of the developers.
I do agree, it is largely the publishers, but it's hard not to be upset with a trusted developer figure also promises empty claims. I don't put much blame on the guy and I really do mostly despise the publishers, marketers, and PR guys responsible for the behind-the-scenes shady deals, choices meant to purely maximize profit, and PR stunts (or lack thereof, as it would seem in regards to the current PS3 version problems). You're right, developers aren't all to blame, but at the very least, I can hardly believe the programmers haven't found a decent solution to the one major problem, yet. This saved data file size/stuttering and lag correlation as well as some of the choices in regards to general programming resulting in frequent fps dips and sometimes poor, if not unplayable, performance is on the programmers. They decided on "optimum" settings, were in charge of quality control (and, again, following Fallout 3 and following inevitable realization of this huge stuttering problem, it should have been a priority for "fixing"), and ultimately write the code for the game. It's true, they may have needed more time, manpower, and/or funding than given, but they were the ones directly responsible for the PS3 version.