Unfortunately, Alamar kind of hit the nail on the head. In the video game industry, history shows that past performance is not indicative of future performance. High profile examples include Richard Garriot, Warren Spector, Molyneux... But even these great Black Isle developers -- what have they done recently? Avellone has put out some interesting games but let's be real, most of them are not up to par with his older titles. Similar with the other guys.
There are just too many external factors to assume that the same team will continue to produce the same quality.