Why "Photo Similarity" option was simplified in version 4?

[Axolotl]

In ver.3 this option was with a number value that can be adjusted as you wish. In the fourth vesion there is just three presetes "Very Cose Match", "Good Match", "Loose Match" and ignore option. And the problem is that the "Good Match" option misses some matching pictures but "Loose Match" finds too many mistaken matches. Previously i could find the good value for matching most of the right pictures and don't find most of the mismatches. So i think previous method was much better than this simplified one. If you need i can send some selection of pictures that demonstrates the inefficiency of the current method. Sorry for my english.

[DigitalVolcano]

I might add the similarity value option back into version 4.0.4 so you can set custom values.