Quoted from OutpostKodelia:

Thank you for the feedback, this is exactly what we wanted! The whole reason we didn't immediately list it for sale for this purpose was so we could get more feedback and adjust if necessary. We were so focused on short plunging (because who wants to full plunge on this game?) but we didn't consider the auto plunge. We've played it out a bit and can confirm that it does add a slight deflection to the ball on about 1/3 of the auto plunges that can cause it to drop funny into the loop and sometimes not make it around. Short term, we'd rather it do that than mess up skill shots, but it looks like we will be doing some refinement. So yeah, in the meantime, we'd still totally recommend this for people that already have it, but for those that don't... hold off and we'll do some refining!