I've been looking into how well sieved we are for factorial and primorial. While at first glance the optimal sieving point appears to be p=376T for factorial and p=133T for primorial, that's only if we're going to test up to the maximum candidate size. For where we are right now, we're oversieved. In the time it takes to remove a candidate by CPU sieving, one can test 3.27 factorial candidates or 1.64 primorial candidates. By definition, when it takes longer to sieve than to test, it's time to stop sieving.
Being on PRPNet, primorial and factorial testing don't progress very quickly. Since LLR won't work on those types of candidates, PFGW is used. We don't currently use PFGW for BOINC testing and there are no plans to do so. So they're going to stay on PRPNet. Sieving for a candidate size that we might reach in 25+ years doesn't seem to be a good use of processing power right now.
Effective November 1st, no new sieving reservations will be accepted for either factorial or primorial sieving. Sieving will be suspended until such time as it's needed again. Obviously that'll be sooner for primorial as the testing/sieving ratio is smaller.
Feel free to discuss this, but from my point of view it's hard to defend more sieving at this point in time.