Flatter trajectory is a definitive advantage - beyond a shadow of a doubt.
However, a brutal draw cycle or a bow that you can't hold back is a definitive disadvantage.
Now... If somebody was to create a system that gave you the speed, without compromising draw cycle - now THAT would be the cat's meow.

Just saying.
...and I think somebody mentioned that a flat trajectory shouldn't be used as a crutch for people who can't judge distance . . . suggesting that "practice" is in order. Well, it should be noted that some people just CAN'T judge yardage. Specifically, anyone (like myself) who is one-eye-dominant, is practically robbed of any ability to perceive depth, because we can't triangulate in on the target due to poor vision in the subdominant eye.These problems are more common than a lot of us realize.