Junker Marauders | JM|-

[Moberg]

I for one didn't mind any interaction with the JM|- so far. To me, they've been great opponents and great allies. They are a good alternative to the in my opinion boring Congress and I they are my favorite Junkers to play with.

Stuff like this happens all the time, and I can not see what's wrong with their playstyle, given it's a natural thing to adapt to your fiercest enemies strategies, as explained above by somebody else already. If at all, you should go back to the root of the problem, which is them having to adapt to the fighting style of the IMG. Your interaction was the result of said adaptation.
Trying to cut off branches that came from the root won't work, you have to get to the root of it itself. I think in your case, might be good to post in the IMG feedback too.