この制度には改良の余地がない。の英語

There is no room for further improvement in this system.

There is no [ample] room for further improvement in this system.

This can hardly be improved on [upon].

This system is bristling with defects and drawbacks.

There is room for improvement on this model.

There is still room for improvement in this plan.

This plan can stand further improvement.

This leaves no room for improvement

This is not an improvement, but a change for the worse.

There is still room for ameliorative action.

That was amended to some degree but it is not complete.

I doubt whether this will improve.

That still has room for improvement.

That has become a situation with no hope of further improvement.

That hasn't been revised yet.

This project admits of improvement.

It leaves much to be desired.

There's a lot of room left for improvement.

I am not satisfied with the current situation and seek improvement.

It is not possible to make changes to this order.

The situation is capable of improvement.

Actually, the present method has plenty of room for improvement.

The design is being improved so that we may avoid any further disasters.

That has quite a bit of room for improvement.

What was improved in that?

What was improved with that?

That has quite a bit of room to make improvements.

What was improved in that?

There is plenty of scope [room] for improvement.

The situation leaves a lot to be desired.