Happened to me once , took another sleeve and tapped the old one out with a hammer, didn't see the need to find an solution as its only happened once.

There isn’t anything to prevent a sleeve from fusing to the coil. If it happens it means something else failed and odds are the coil is bad.
You got lucky and caught it in time, but that is rare. If there was a case where I couldn’t get it out I replace the coil.

FWIW, this has not been a common enough occurence for me, over years of owning EM thru modern games, to worry about. I clean and/or replace coil sleeves every so often depending on amount of play and deal with a bad coil if it happens - which has been rarely.

No it won’t.

Replace the coil and the sleeve. Try to figure out why the coil overheated like that.

Correct. A Bad EOS doesn't increase the current or let it spike.
It sustains the 'correct' amount of flip current through the hold process. Continuous current held over a long period or during long play, will heat up the copper coil and eventually melt it.

I'm not an EE, so please excuse my vocabulary.

Even a properly set up flipper coil can get warm, take away the EOS and they can get hot very quickly. Look at some of the old threads about LOTR flippers and how they degrade during a long game.

Again I’m not an EE but not sure how a slo blo would work here. I don’t know how you find the right amperage that would allow the coil to work properly over the long run and guarantee to blow if there is a malfunction.

The best answer is still to install properly adjusted EOS switches.

The only time I’ve ever seen a Flipper coil go bad like this is when a previous owner bent up the EOS or installed it wrong. They don’t just go bad in the time between regular maintenance.