Two tricky things when it comes to pixel count...

On one hand, you have to remember that huge MP doesnt do much if the glass can't resolve well enough.

On the flipside, I have to note that switching to high MP full frame makes it a lot easier to do good, clean crops. Sometimes I might care about a small portion of the frame but for composition reasons (e.x. can't get closer for one reason or another) I at least can lean on cropping more.