Allow a major action to take a minor action.
Sometimes, you want to take two minor actions. This isn't an order option, this is a sacrifice a major for an additional minor action.
The only issue with this is that someone could abuse Dash and turn it into warp speed. But other than that, it's a good idea.
I agree, the Minor/Major distinction is neat - but sometimes the important thing you need to do is your Minor action and you need to Move first to do it.