EB 1.2 is unbelievably stable for the amount of content added to the original game, the complicated scripting, superior graphics, etc. The team has done a great job of releasing bug fixes for major things which cause ctds. If there is something you stumble across such as an incorrect unit card or spelling mistake, you can always ask in the forums and someone will tell you how to fix it. I think perfection is a bit much to expect, but EB comes as close as I've ever seen a mod for RTW come to it. Remember that they are limited by hard-coded elements and the engine itself so issues with AI, dipomacy, etc. are usually things EB cannot fix, and things which all mods are going to suffer from. Fans of EB like it for many reasons, but that doesn't mean it's the perfect mod for everyone. For me however, it's the only mod.