You could try setting prescale higher to use w/ the BGFX chains if you think they're too soft, the chains now take into account the prescale setting a few releases ago.
Note however that there is a BGFX bug currently where if you do have prescale and move off via slider to another BGFX chain it will 'lose' the prescale and soften up.
[Update] Hmm, I had forgotten that we still have some weird interplay w/ prescale and some of the BGFX chains. So maybe take that into account if you want to try to sharpen it up.