Heyo! So I'm not sure how difficult this would be to code, or how over-powered it would be, but hovering on a broom seems like it would be very helpful.
My idea is that that would be accomplished by holding the jump button (space by default) This would slowly bring the flier to a stop at their current altitude (faster would generally equal a slower stop but better brooms may have faster deceleration). Anywho, as this, like most things, may already be being coded so I'll stop talking now ^u^