My opinion is no. I went to become a BTL. I was awarded the CSA's.The CSA's proved no good. They are still in my team. But they are totally inactive.Also I have a lot many PSA's but they are also not active. They turn on to site rarely. so investment and without returns I decided to step down and be satisfied being an EA. When the good day dawns of few active PSA's & CSA's I suggest should be right moment to be a Team Leader