#1
Hello. I never tryed an epiphone or gibson with junior type hard tail, without bridge. I know that you cannot setup intonation. Can you setup string height? Is this a good hardware or is the obe with bridge better?
#3
You could also replace it with an aftermarket wraparound TOM that has individually adjustable saddles for intonation.

As for string height, the saddles will likely be set at a specific radius, but it can be raised/lowered as a unit. Generally speaking, if it's had good fretwork, this will be less of an issue.