I don't see anything AA has done in STL regarding DL or WN as a "fight". I see all of their actions regarding flight reductions as a complete surrender.
I think matching DL's massive STL promo qualifies as "fight a little bit at least" as I stated. A complete surrender would be defined as "not matching that promo".
The poor STL AC agents have that promo printed out and highlighted right at the check-in desk - it's hard to miss. Those (wonderful) agents are certainly trying to do all they can with what weapons in the battle they have from AA.