Is in my mind that I want my hunting rifles to have very snug fit at the recoil shoulder - so most all of them I have done the epoxy bedding. I am to the point that I think everyone should be able to do that, without a lot of fuss or commotion. I have a few - 1920's guild rifle, Schultz and Larsen - that I chose not to touch - I want to use them as the "old folks" made them - is no sign that I can find at all that there is anything to "fix" in the bedding that they did with their wood scrapers and chisels. But also need to be sure that the receiver and barrel are proper depth within that stock, that there is something done for support for the rear of the action, and so on. I have several examples of various attempts to "glass bed", that basically ruined the rifle - did not appreciate, at all, what they should have been trying to do. So epoxy bedding the action can be a good thing, can not be needed and can actually cause a great deal of difficulty, if done sloppy.
About the worst, I think, is inadequate clearance, then torquing down the action screws when epoxy bedding and actually putting a bend or bow in the action - where a phrase about "stress free" comes from - is opposite of torquing it down for epoxy to set up... followed very closely by being chintzy with the release agent and gluing parts together, and then using a pry bar to separate them - and breaking those parts.