TODAY I WAS PLAYING AND I WAS TELLING MY ALLY TO CREATE HEAVY SCORPIONS WITH INCAS NEXT TO MY SIEGE ONAGERS, BUT HIS SCORPIONS WERE NOT UPGRADED, I TOLD HIM TO UPGRADE THEM OVER AND OVER AND HE SAID THERE WAS NO UPGRADE FOR IT, WE ARE ALREADY IMPERIAL, AND THEN I DIDNT TRUST HIM AND STARTED THE GAME SINGLE PLAYER TO FIND IT OUT AND YES THE UPDATE BUTTON FOR INCAS ARE MISSING IN 1.6, NORMALLY INCAS HAVE HEAVY SCORPIONS, IT SHOULD BE FIXED, I HAD THE SAME ISSUE WITH HALBERDIERS BEFORE, BUT AFTER A NEW UPDATE RELEASE, IT GOT FIXED...