I have not used the MXR Bass Synth at church yet but at home using multitracks to play along with Bethel songs I am more than happy with using the MXR as a replacement for the EHX BMS. Preset #4 is close and I tweaked it to be more Bethel-like. And the Tony Levin octaver preset #5 has replaced my octave pedal. My tentative fall pedal line up:
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Pulp N Peel is a very cool compressor. I love it. DI, as well. This replaces my Empress and/or Cali76.
BassRig '64 is a great Fender amp replacing my Tone Hammer for now. I just dig the authentic bass guitar sound from the '64 BassRig (no cab sim).
The Fuzzistor (placeholder) is really the Broughton Calamity, my favorite drive/fuzz after trying many. Replacing the Kilt.
MXR Bass Synth is replacing the octave pedal and BMS.
I'm eager to hear how other worship boards embrace the MXR Bass Synth as the months go by.