Limiting Mail Rules modifications logically

The Problem

For Mail Rules, There are only five available actions to do in the case of conditions are met. Although, You can click + button to add new action row for many times more than that specific five actions.
Also, Actions can be repeated, which wouldn’t be doable in a practical way, like adding two “Move To Trash” actions.

Proposed Solution

Limit the actions rows to only unique five actions.

Alternative Solutions