What TaLaR said, you don't really control your fleet as much as you herd it.
This even applies to allies, if less numerous than your forces they will attempt to plug themselves in your formation and will somewhat follow the flow of the battle.
However i digress on the AI's inability to be an effective combat force, as i rarely pilot myself and even then only temporarily.
First of all every single ship need to be on agressive by default, reckless is suicidal and redundant with the Full Assault order while everything else makes them scaredy kittens, and yes even carriers, a carrier is safer on the battle line than alone somewhere, it can use what little it has and tank a part of the enemy barrage, fighters and bombers take less time to go around and can pursuit the enemy further, don't be like those WoWs CV players.
Make sure your battle line stays cohesive enough and exploit enemy positioning by giving Eliminate orders on vulnerable ships, followed by either regrouping or launching Full Assault when the enemy line breaks.
Reminder that one defence order risk making a blob, two next to each other helps forming a line.
Be generous on the flux when outfitting them, no fancy stuff, focus on what is simple, has a good range and deals reliable damage.
Missiles? Must be meaningful effect with plentiful ammunition. Sabot? It's their get out of jail card. Harpoon? Good finisher and the enemy AI loses it's mind against those. Reaper? They'll waste it on the first Kite they encounter.
Available order points are not an issue as long as you use them in the same time-frame, and always clean out of date orders when they are detrimental to you, it's free and has to be done, examples:
-Keeping an Eliminate on a ship that is hiding in the enemy blob will make your ships suicide one by one trying to get it
-An escort order on a ship who's fine when the escorts could be doing something useful instead
-A ship guarding a defence order way behind your line doing nothing
-Not cancelling a retreat order on a ship to force disengage, if his hp bar is decent keep it in battle
-Leaving Full Assault On when the enemy reinforcements are regrouped, don't headbutt a wall