I have a passage that I've composed at quarter note = 175, containing a melody that contains mostly eighth notes and quarter notes, all in pizzicato. The cello and bass parts are doubling each other in octaves, except that how I have it currently is that the eighth notes are kept in the cello line, and the basses are only playing the strong beats as quarter notes. E.g., see the image below (in written pitch).
Is q = 175 too fast to have doubled eighth notes sound clean? I'm considering doubling the bass part with the cello part with the eighth notes for some passages.