When you say fail, you mean they secure the takedown but they fail to advance or do damage ? In that case, no they wouldn't necessarily be losing, it would still be even since they didn't do any damage. Their opponent may do pitter patter strikes back against them in this situation but those don't count for much, so again, I don't see how they would be losing just because they aren't scoring for a takedown.
If they fail at securing the takedown it would also still be even.
And yes, the effect of this would be to dissuade fighters from attempting takedowns just for the sake of takedowns with no damage.