I have to beg to differ. I made a scenario with totd units and a friend who doesn't have the totd tried to start it up and he got that *message and couldn't play it. I simply removed the dlc stuff and it worked for him.
*The message told me exactly what units were part of the dlc. I also had no problems with my units changing.
Nothing like you mentioned was done on purpose. I'm going to work with this to see if I can help. What units changed to dirt and rocks?
[This message has been edited by That AoM Guy (edited 04-21-2017 @ 09:18 AM).]