You're acting like there's a development cost to keeping a mechanic that's existed for over 6 years and a development bonus for removing it. There isn't. And a loss being relatively minor compared to what it could be doesn't make it not a loss, let alone necessary.
That's like explaining away having needlessly removed a patient's little finger. It doesn't work that way.
You know what? I'll give you the benefit that you can come up with something sensible, but do try again.