I don't understand what you're saying here.
In Civ4, or in the trade system I proposed, trade routes have no protection except for on-map warships. This means that me raiding your trade routes with my warships is valuable and is a high-return strategy, and it means that you respond to that by using your warships to attack my raiders. I can see your warships, and I interact with them through the normal combat mechanics.
Yes, and I'm not talking about your system. I'm talking about a system in a completely different game.
Also, warships never left the screen. So, you can see them and they can see you.
In your system, if I raid your trade routes with my warships, then I get lower returns from doing this because of escorts, and "combat" happens through some offscreen die-rolls that don't use the normal combat mechanics. So its non-transparent, and its very unclear how for example higher strength units, or combat promotions and experience will affect the warship/escort interaction.
Actually, I said higher tech could change the balance for or against you.
And you don't have to actively defend your trade routes at all, you just use passive escorts - which are totally useless at all times that your trade routes are not being raided.
Eh, no. That's is not what I am saying. They are still being raided. Why wouldn't you deal with the threat?
Also, I said you could toggle escorts on and off.
Its much simpler to just keep all the warships onstage in a single layer, and not have any warfare that doesn't use the normal combat mechanics.
"Warships" are on a single layer. I never said they weren't.
They have never said that units won't die. They've said that, in general, units won't die from a single battle.
For example, hypothetically they might just lose some hit points - but still die when their hit points reach zero.
Ah okay. That still doesn't sound much better. However, that's not what were talking about so I'll leave it at that.
Okay, obviously this is sounding so complex that it's not making any sense even though this is an almost stupidly simple mechanic. Everything you don't get I've explained so I guess I'm going to have to break it down to even simpler terms. So, let's go Sesame Street on this.
Your Model
Trade Ships Invisible
Warships Visible
Warship Attack Invisible Trade Ship
Invisible Ship Dies
(THIS IS STILL OFF SCREEN COMBAT JUST LIKE YOU'RE COMPLAINING ABOUT!)
My Model
Trade Ships Invisble
Warships Visible
Warship Attack Invisible Trade Ship w/o Escort
Invisible Ship dies
Escorts turned on
Escorts Invisible
Warship Attack Invisible Ships
Warship less effective
WHERE IS THE CONFUSION?
FFS, it's almost the same model. Both Models REQUIRE VISIBLE WARSHIPS to kill the other. Forget losing ships at all. Your Model is 100% effective against trade ships. There is no mechanic to take your VISIBLE WARSHIPS to protect your INVISIBLE TRADE SHIPS so you could simply ignore it anyhow. In Civ4 your ships sat around in a blockade doing nothing against INVISIBLE SHIPS, but somehow stopping them.
Sorry for the rant, but the reality of it is that it's not that complex. You're making it sound way harder than it is. All my model adds is some sort of defense that lowers the effectiveness. Sure you could run escorts all the time, but why? Hence the toggle. It will cost resources to use escorts, but it will be less resources than doing nothing. Even less damage if you actually moved warships to go kill the raider.
Doing Nothing = x = resources lost
Toggling Escorts = x + tech%boost = Resources Lost
Killing Raider = Zero Loss of Resources
These off screen calculations you seem so hung up on are not a big deal. If you're using a Submarine to raid a Civ that is using Galleys, you're going to be effective. If you're using a Submarine vs a Civ that has submarines, you're not going to be AS EFFECTIVE. You're still doing damage, but not as much as if there were no escorts.
You start with a base %, then certain techs make you more effective or conversely less effective depending on what side of the coin you are on.
Sure, this doesn't make your Navy the omgwtfbbqpwnmobile you want them to be. Heck even take out losing any units or even losing any strength if that bothers you so much. Now you have an invincible ship doing off screen damage to and INVISIBLE SHIP once again without any sort of repercussions.
I'd rather see some risk to your units, hence the escorts.