The church has refused to even consider feasts for over a thousand years, and even my suggestion that anyone think about having them is met with a solid wall of refusal to even consider them. I still think God's ways are always worth at least considering, the whole organized church does not thing so. It is their choice. But the idea that if they praised and celebrated God it would be to IMPRESS God is off the wall.
The ways of the Lord are for our benefit, to refuse to consider any of them is not affecting God, it is affecting you.