RE: Importance of speed?
Don't worry about the table. I hate arrow drop tables anyway. They don't really mean anything in the real world because we shoot arrows on a trajectory. We need to see trajectory tables if we truly want to know how much difference speed really makes.
Steve Jackson used to have Andrew Middleton's excellent graphing trajectory calculator on his site. Unfortunately,the link is brokennow but I used to spend hours on there comparing different arrows and then trying them out on the range.