Basically, there's a point where everyone is overpowered now. Even at a point, Nick contradicted his own words saying that the reason why Movement Speed was very slight was (not exact quote but) "not to disrupt everyone, or rather to keep everyone within a group."
Now the problem here is that Movement Speed Booster is... well... insanely fast. Near enough that it's basically Movement Speed: Maximum. This not only disrupts the flow of gameplay but basically made everyone insanely overpowered. In fact, the Attack Booster doubles damage, this shouldn't be the case, ever.
As much as I like running insanely fast, these are basically the suggested nerfs and/or changes applied:
Attack Booster:
-Decreases Damage Bonus from 20% to 12%.
-Time is decreased from 30 Seconds to 10 Seconds.
-Uncommon drop, higher chance to be dropped from Elite-Tier Monsters. (IE: Trojans)
Defense Booster:
-Defense is changed from increasing currently existing defense to 20% overall damage reduction.
-Uncommon drop, higher chance to be dropped from Treasure Boxes.
Speed Booster:
-Movement Speed is decreased from Maximum to Medium.
-Applies Attack Speed Increase: Low
-Time is decreased from 30 seconds to 20 Seconds.
-Uncommon Drop.
Yep, the boosters really needs a nerf.