Which would you eliminate?

[BitBuster]

Pink balls are utility monsters. They work well for "machines" of monsters hitting buttons because their motions are the most highly constrained of any monster besides the tank. You don't have to worry about things getting busted by having a ball diverted from one area to another by a block.

When I think of noteworthy pink ball levels, I think of Beachballs from CCLP3, which seems to encompass most interesting aspects of pink balls.

Very good points. Certainly the game would lose something by cutting pink balls...I just think that it would cause the least "damage."

Perhaps designers appreciate them more than players? I just know that, in general (and to me), pink-ball-heavy levels tend to be less interesting than levels that involve bug rerouting, fireball arranging, etc.

That said, it's almost always less stressful to deal with pink balls than it is with blobs.