That's kind of the status quo, I just feel that a properly done CGI block should be, in theory, much, much, much stronger than just a cryo treatment. Plus me personally, I get worried about the quality control at international back in the day and even now with the core blocks you're getting.
Sure you can do a dye-pen and even magnaflux the block if you really want to, but there's still always that risk that bothers me if you're really going to push the block to it's limits.