Brad subscribed to the "Dennis's music wasn't commercial and didn't and won't sell" theory
Having personally heard Brad hold forth on the greatness of Dennis' music, especially
Pacific Ocean Blue, I think that's a bunch of malarky!
If I remember correctly (and the old brain cells may not be functioning as well as I'd like), that
Brother Years set started out as the third volume in the
Greatest Hits series of CDs, with a track lineup that focused almost entirely on charting singles, including things like "It's Getting Late," "Rock 'n' Roll To The Rescue" and "Still Cruisin'." (My memory also says the token "rare" track on the set was the 45 edit of "Cool Cool Water," but I won't swear to that.) Then the suits at Capitol got to playing with the set, dropping songs right and left in favor of non-charting tracks likes "Susie Cincinnati," "Disney Girls," "Trader" and "Honkin' Down The Highway," and even retitling the thing.
In the original conception (charting singles), none of Dennis' songs fit. By the time the album was released, there was no real concept behind it, other than to put out a collection of songs that a bunch of higher-ups at Capitol personally liked. I think the entire team on that project -- Brad, Andrew Sandoval and Cheryl whatever-her-last-name-is (she was on staff at Capitol) -- was immensely frustrated by the time it came out. If, from the outset, the album had been designed as a true "Best of the Brother Years," I feel certain they would have included several Dennis tracks, probably "Forever" and maybe something like "Baby Blue."
Somewhere I think I've got the original track lineup for
Greatest Hits 3 that Brad sent me lo those many years ago. I'll look for it and post it if I can find it.