Some feedback about units

I have a recently rebuilt force of lvl 6 tacs, I keep having to rebuild it 'cause I attack anything with them.

What do you propose? You can't build nukes without them so I think they are fine as they are. I wouldn't build many because I like to capture enemy buildings intact.

Strats are good for locations like France vs USA to soften forts/ICs before an invasion (Speaking from one of my Roleplay maps, this is what is being prepared)

Strats are terrible. Probably the most worthless unit in the game. Incredibly situational. Most of the time, you do not want to hurt buildings in enemy cities because you plan to capture them. If an enemy has a bunch of units on a fort, use rockets instead. If they have a fort with few units, then you don't need strat bombers to clear it out.

I disagree that cruisers need to be stronger vs. subs. Historically, they were not, (except maybe in wwi). Same goes for b-ships. Destroyers are the anti-sub naval unit. You must escort your cruisers and b-ships with destroyers, it's what they're there for. That is pretty much their only purpose as a unit.

Naval bombers seem bad because most people spend a lot more time engaging in combat on land vs. on sea. If the opposite was true, naval bombers would be better than Tacs. They just seem less useful because the thing that you use them for isn't used as much as the thing tacs/interceptors are used for. It's not that they're bad at what they do. Besides, they got a big boost when Carriers came out.

Yes, and now with a Pacific Map, even more valuable in huge Naval conflicts.