Alright, managed to simplify the circuit slightly by removing the series resistor on the inverting input, since the Thevenin resistance of the offset voltage divider on the inverting input already serves that purpose. Since there are 4 copies of this circuit in the final product, every bit helps (resistors are cheap, but it makes tracing the final PCB a lot easier). Putting the capacitor in this configuration instead of in parallel with the feedback resistor also simplifies the routing a bit, even though it does have the effect of causing the cutoff frequency to vary with the flex sensor, but fully flexed (R2 = ~400k), the cutoff frequency is 8.8Hz, and fully relaxed (R2 = ~80k), the cutoff frequency is 27.4Hz, so that range is fine for our purposes.