I remember when they first announced those "improvements" and thinking to myself, "They'll just be rolling them back in a year or two." I must be psychic or something...

The way they advertised it was ridiculous, too... They said they were doubling the frequency to/from the Peninsula stations by bringing another line down there, but if you pay any attention to the service patterns, the two trains come one after another, so the benefit is minimal.
Personally, I prefer the 15-minute headways over the 20-minute headways... Even though I still have to "time" when I should leave work to make it before my train, it gives me more options.
Seriously though, I think they need to get creative over there at BART... Every time they're in the red, they seem to immediately think service cut. They run 9- and 10-car Pittsburg trains well into the night when they're mostly empty... Huge waste of money in powering the cars and the extra wear/tear and maintenance. I wouldn't be surprised if they could use shorter trains and keep (or improve) the frequency as is, without increasing O+M costs.