Casey is fucking terrible, and Raptors fans have been wanting him to get fired for a while. His players doing most of the work in taking them to 50+ wins is why he's still there
They have the hotline on Jerry Stackhouse, might want to consider not even risking losing both, even if they can get another good candidate that they might prefer.
They should totally give Stackhouse a shot unless a hall of fame-level coach falls out of the sky. Whatever coaching Casey is doing is clearly not enough to get over the hump. The Raptors have a good roster. Time to let someone else have a chance to rewrite the playbook.
The Raptors always look terrible in the playoffs because the other team has time to prepare for what the Raptors are doing to a greater extent than what is possible in the regular season. With preparation, almost any coach in the league can draw up game plans to defeat everything the Raptors are doing.