It seems to me, that once you get to a certain fleet size, a lot of different unit types become very difficult to manage and possibly not even worth making against the CPU. It will auto-target and kill anything that is providing your fleet with any sort of utility. I experienced this in my previous game as Vasari versus a Vicious TEC AI, in which every time I started mixing my fleet with Overseers, Subverters, Carrier Cruisers, and even Sentinels, they would focus fire every one of them until nothing but all of my Enforcers were left. After awhile I just said "screw it" and massed Enforcers. I still won, but it took some fun away from the game not being able to really maintain a more versatile fleet during a battle.
But then I got to thinking, that a lot of those ships were probably not really doing me much good in these massive fleet battles of brute strength and numbers. Specifically, I didn't really see how the subverters were doing much at all, where disabling a single ship for a few seconds out of hundreds, could really turn the tide of any battle, especially when its too difficult to get them to target what you want during all the chaos.
What are your thoughts on this? Could I just be a better player, and am missing out on some finer points of managing my large fleets?