Yes I agree, I would expect improvement and he is a good signing and maybe being well under the points limit will help if they have problems later in the season, personally if I was a Birmingham fan I would prefer my team built to the limit.
Vuolas was always likely to be available having been dumped by Belle Vue but I am surprised he has ended up at Birmingham, like the previous season when Tom was picked up by Birmingham having been dumped by Belle Vue.
Zagar has an existing average of 7.20 anyway so don't see why the need for re-assessment, other riders have come back like Tai did on his previous average, I don't think it will be re-assessed.