Sleep, my darling Sentry...

What if the Sandman's ball attract the attention of the enemy's sentry for a couple of seconds?
Throw the ball and run while the Sentry is shooting the ball.
Remember: don't run between the ball and the Sentry - because it chooses the closest enemy.

Idea for Medigun

The closer to the mate, the faster it heals. Or vice versa.
Just an idea.

Mechanics for the Rocket Launcher.

Next shoot only after the previous rocket has been exploded.

Bonk! (Small Idea)

If you were attacked under the Bonk! Effect, it's duration will be longer.
See that "MISSED!"? Stop attacking this Scout!