Effort that goes further than necessary, 8 letters
Excess, 8 letters
Excessive effort, 8 letters
It's too much, 8 letters
Much more than what is required, 8 letters
Put in a larger blind*, 8 letters
Too much, 8 letters
Too much of a bad thing?, 8 letters
Too much of a good thing, 8 letters
The capability to obliterate a target with more weapons (especially nuclear weapons) than are required, 8 letters
Any effort that seems to go farther than would be necessary to achieve its goal, 8 letters