I'm talking specifically about bugs, not gameplay changes, which you mentioned (except for the timer display). People who play casually don't know anything about these issues, so it probably won't matter to them. What I mean is: error messages when attacking neutral creatures where a Guardian Spirit was present, after which the game continues normally; incorrect resetting of heroes below level 1 (negative experience for monsters, reduced stats for heroes if the bonus was an artifact for primary skills), game crashes when visiting a dungeon with Mulich, etc.