It was the same when I visited the Pleasure beach on the way back up to Scotland from Alton Towers. It was practically empty. I had been on pretty much every major attraction within 2 hours of being in the park.
In all honesty BPB is starting to look very tired. Not to mention the fact that rides were closed all over the place, and the new payment system where you have to pay to enter the park even if you do not want to ride has put a lot of people off. The pleasure beach really needs to think about getting the place back up to scratch. There was just no atmosphere in there, it looked dirty, run down and empty.
As far as attractions go, Alton Towers added Thirteen this year and Thorpe Park added Saw last year. Both of these coasters added something major to the UK's theme park industry and got the attention of the worldwide press. Both additions boosted attendance to both parks retrospectively.
Don't get me wrong, the pleasure beach added Infusion, but this was just a relocated coaster from Southport. Its also a standard SLC that pretty much every other major park of the UK has a copy cat of.
Its unfortunate, but that the majority of today's society is always looking for the next big thing.
At least Dreamland will offer something no other park out there can. This will be the worlds first heritage park

If it is run correctly, kept clean, offer an amazing atmosphere and a great day out, there is no reason it can't be a huge success. I cant wait to visit on opening. Will be on the first plane down from Scotland
