I appreciate the additional information but as someone who plays as chaser most of the time I can say that it's causing more issues than solving problems. Using one timer is something I am only ever able to use in very specific situations, where I'm in front of the hoop, someone else too and this other person is passing to me rather than trying to score themselves (which barely happens). Even then I have to think quick and I mostly don't think about using one timer.
What tends to happen more often is that, when the enemy team just scored and the quaffle is in the hands of the keeper, I'll be near our hoops asking for a pass. But sometimes the timing is so wrong that I accidentally throw the quaffle by means of one timer in front of me, leaving it wide open for the enemy team to steal and score again.