Oké, this is something that for me is really annoying, but there is one feature on I think only riesa dresden that when you play with sifa and pzb on and you want to acknowledge sifa only sifa works and not pzb, so pzb only works when you have something you need to acknowledge. Which is nice so you don't get you're train shouting at you every 30 seconds when you only want to press sifa. And I don't get why this is only on riesa dresden and not the newer routes, because it's the main reason I don't play with sifa. So I hope this could be added to all routes as I think it's not that big of a task.
This was definitely supposed to be a thing after Riesa Dresden released, but then it never has been. Would definitely make a significant difference to the playing experience.
