I agree on all points. However, I cannot 100% dismiss the potential. Say you're upping a fighter sortie and going to have some fun but you see a random number of formations between 1 and 3 sets (and randomized whether mixed type or same type). Wouldn't that add a little extra interest to your mission? Sure you can avoid them and go on your way, or you can try to engage.
It would add a little flavor. Same as folks that have asked for a moving frontline that has some AI firing at each other, etc. Something to interact with.
In this case you would need bare minimum:
1) NO OTTO!!!! Otto was the bane of WB. None of that "you die if you get inside this zone" type of AI gunners. They should be dangerous, but they're AI not human so they shouldn't be so bad nobody wants to engage them.
2) They should miss their target a lot too. Because they're AI and not players, their target (randomize it to be hangars, field towns, or strats) shouldn't be in dire threat if you don't stop them. Make them have a randomization factor in their calibration or just hard-code them to miss by a mile at times (or just negate their bombs a random % of the time so no damage done?). That would also allow bomber pilots to tag along in-formation as if pretending to be AI then dropping real targets by properly calibrating and so forth. A little cat-and-mouse game and a little AI cover for the bombers, albeit of dubious quality.
3) It can't be all the time, every time. It should be generated once an hour plus or minus 15 minutes - numbers open to debate - and only affect a target within 1.5 sectors of a full dar-bar sector. No rear-sector raids with no chance of running across the enemy. No mindless spam. It should at least go into harm's way but the balance is to make it an addition, not a deciding factor, and not something you should rely on.
And this is all just brainstorming a possible inclusion. I'm not saying I'm for them, exactly. I'm just saying while it's not my cup of tea I think I can see a way they are included into the main arena without harming it in any way, and possibly helping it. Because of that I can't flat-out dismiss the suggestion in my head, you know?