Glasner would definitely leave. He literally was about to walk until they pulled the Guehi deal to liverpool after he passed the medical. He knows he's hit the ceiling at palace. Wharton and Guehi be gone in the summer. Sarr off to African cup of nations. Even rumours that Munoz and Mateta could be sold in January too.
I think he was shocked by how Palace didn't bulk up the squad in the summer with European football. Then he was even more shocked that his chariman tried to sell Eze and Guehi in the final week of the season without replacements ready. Its no secret that he's waiting for a big job and he's gone.
Would he come here? I assume he would tbh. Unless he thinks the Liverpool or United jobs could become vacant and he's been told by his agent that he's in line. I personally don't think united or liverpool would have any interest in Glasner. Similar to Frank, we are his next step. I don't think he gets one of the big clubs!