Hey, let's face it - Stern may not be here making games today if Data East would have been a total failure. You've got to give the brand credit for that.
I'm wondering if anyone can attest to whether or not Data East was the same price point as Bally or Williams. I'd assume Data East were less expensive, to get more people in the price point they can afford. As for quality, they just don't feel as solid or polished and smooth overall, but they were the new guy and they had to come up with some different things hardware wise since they kept getting sued by the competition trying to keep them out of the business. Competition must have feared them for a reason.
My Data East games hold up extremely well, so I have no experience with them being any more problematic than any other brand. The licensing probably also cost big bucks, so their overall budget would have been hindered a bit due to that.
In spite of all that, they went for it, they went big, they got some huge licensed titles and put out some pretty kick ass games.
These arguments about crappy art and crappy sound can also be said about plenty of other vendor's games.