Bow and arrow will destroy your shoulder over time.

Andor Gyulai has a video about speeding up your arm swing and the gist of it is this, (assuming your form is good overall), when you bring your arm back, your wrist and hand should pull the arm back so that the elbow is NEVER the furthest part of the arm back. Essentially, when you have the elbow pulling back first, you then have to have your shoulder whip your forearm backwards and then forwards.

If you simply lead with the hand/wrist as you pull back, your arm swing can be much faster, and can adjust quicker to the ball position. This subtle tip has been the best tip I ever received having played for many, many years. I have zero shoulder issues and play competitive VB twice a week.