It seems excellent idea to me is

This idea is necessary just by the way

This brilliant idea is necessary just by the way

I think, what is it good idea.

The helpful information

The authoritative point of view, curiously..

It is remarkable, this valuable opinion

And where at you logic?

Alas! Unfortunately!

In my opinion you have gone erroneous by.

I can speak much on this theme.

What necessary phrase... super, excellent idea

I think, that you are mistaken. I suggest it to discuss.

In my opinion you commit an error.

You are right.