Question on Feathered Fletching + Accelerate support gem

I just noticed that when FF passive node is active, the +/- on proj.speed is not calculated on the skill dashboard (dps remains the same when I plug/unplug acceleration gem)

Would it be possible and useful to be improved in later versions?

I can answer ur question pal. U can see the description of Acceleration gem is that have 40% MORE proj. speed. And the F.F passive node is described as Inc/Reductions proj. speed also apply to bow damage. It's a same example in POE1. INC ≠ MORE. Hope that will help u.