In terms of business practices Bioware is probably a worse company.
In terms of games they are still quality, the ME trilogy is excellent, there are positive views on Dragon Age Origin and their Star Wars game. Only DA2 was a disappointment.
Blizzard not sure if anything changed in terms of business practices, in terms of games they have quality games still.
So overall I don't see much of a loss in either case other than some possibly worse business practices by Bioware though those are not really very significant.