Personally, I'm not very concerned about this since engineers appear so late in the game, at a point when all my games have already been decided. The only important GOTM builds in the IA are ToE and perhaps Hoover Dam, and those can't be short rushed anyway. Possibly, an epic sid game could be an exception, but building railroads is the only kind of micromanage I'm willing to do in the IA. Interesting, though. Obviously it should be banned, if not formally then informally.