Now that Dembele and Clint Dempsey have gone, the Bulgarian will be the focal point of Jol's side.
Jol said: "You build teams around good players - and Berbatov is excellent quality.
"He showed exactly that when I was at Spurs. It's about finding the right balance. If players come back it will be OK and maybe we have to change the system. With Dembele it was different.
"He [Berbatov] really looked forward to playing with Dembele. The first thing he said to me was, 'Where's Dembele going?' and I had to say he's going to Spurs. He was disappointed.
"He was told that before his medical, but luckily we managed to keep him in the building.
"We've made money but the problem is that we've not had enough time to spend it."