They (you) should stop changing the user interface for each and every little thing.
ユーザーインターフェイスをことあるごとに変更することをやめるべき。

My position is that macros are needed for code re-use, which is most
definitely a good thing. However, I do agree that we went too far in
creating macros for each and every little thing.

以上は大丈夫だと思うけど、意味がちょっとずれています。

ほかに、「for every little thing that crops up」
「at the drop of a hat」などの言い方もあります。