Again, fixating on the negative. The penalty period is 1/12th the length of the buff period. 6.5% of the time. And calling the player useless during this period is nothing less than hyperbole. You can still manage aggro, you can use the two AoE controls SS gets to stop the enemy attacking, both things that are well within the expected role of the tank classes Super Strength is available to.
Wrong. Rage is the only melee self buff power that penalizes the player for using it, but that only means Rage itself should stand above all other melee self buff powers, and it does.
This is subjective. I have no doubt it’s true for you, but it’s undeniably one of the most popular sets in the game and no doubt plenty of people find it fun. I know I do.