I get where this is coming from and I also have mixed feelings about DU, but I am not in favor of removing battalions.
Keep in mind that through removing a battalion you are also removing a place for a group of people to have fun and to do stuff together. From personal experience I can even say that not all people will stay on the server after their battalion gets removed. This could be because they are not able to find a battalion which they fit in and/or are still feeling bad about their own battalion being removed. Honestly how would you feel if your battalion gets removed? I took a half year break since I just did not want to play on the server for a while after a battalion I put a lot of time in got removed!
Also you are saying that it is the most problematic battalion. This might be true, but this changes over time. In the past it was 327th, then it was DU, it has been CG for a while and now it is DU again. This should not be a reason to remove a battalion. I think, just like @Pythin said, that DU needs to get the ball rolling again.
I also think that a lot or even too much of the "fat" got trimmed a while back when 187th, 327th and 91st got removed. I do not see a problem with the current amount of battalions. The reason why I like the server so much is because of the many specializations and removing another battalion is making the server only going to look worse in my opinion. Also, what battalion is going to be next after DU? 104th, 21st or Rancor since they have a dip in their activity?
Overall I just dont think it is a good idea to remove a battalion at this point. -1