booster addition to manual brakes

You could change to a smaller bore M/C, that will give you a better "mechanical advantage/ leverage",, this will reult in less pedal effort with slightly longer stroke..

Check you M/C bore,, and if over 1 inch,, replace with a 15/16 bore M/C,, or with adaptor plate,, one of the newer plastic 7/8' bore M/C..

You might just want to put some miles on,, exercise you leg,, and you may feel it's quite acceptable..especially if they're new brakes.. jmo

hope it helps..