Size Scale and Size By Speed Modules don't accumulate?

Is it possible to accumulate the multipliers of the size scale and size by speed modules? Take for example sparks - I need a random initial size within a range, and I need to increase/decrease the length of the sparks based upon their speed. Additionally, since the visibile illusion of sparks is to die by shrinking in size, I need to scale them down as they die.

However, when using both the size scale and size by speed modules, only the lower module is accepted.

can I bump this for a comment? Or can we add this to feature requests with the dev team?