So what you're saying is . . . you do see suicide invasions, you just don't call them that even though by any definition that's exactly what they are.
But that's not actually what I said.
I can think of one time it has done that since TFH came out, and it wasn't a suicide invasion. It was a pile of armor that was a credible threat to my invasion of France because my armor wasn't near the damn coast (I was trying something different). A novice player would have been in serious trouble, but I took it in stride. And the invasion did buy France two weeks while I shifted forces around to deal with this threat.
A credible threat is not a suicide invasion. An invasion that costs me two weeks in my invasion of France is not a suicide invasion. And an invasion that forces me to redirect my armor is not a suicide invasion.
If that's the standard for suicide invasions, then any invasion that fails is a suicide invasion. In which case, the AI should just never do them. Which is what the AI has been told to do in various versions of the game, which also resulted in players never bothering to garrison the west as Germany.
The suicide invasions from earlier versions were pointless invasions of Fortress Europa in 1941 before Barbarossa even launched by the UK. And launching them several times in a row. And launching them even without the USA in the war. And launching them when the damned Italians are rampaging through Egypt and seizing the Suez. Those were suicide invasions.
As for invasions of AI nations, in about 50% of my games the Brits successful invade Italy and either completely take them out, or force a German response that mimics the real war (although the Brits love to invade northeastern Italy instead of the boot for some reason).
Let's put this simply: the AI still continually throws away its forces in amphibious attacks which a simple examination of the relative strength of attackers and defenders would show are suicide.
No, let's call it what it really is: the AI's ability to utilize amphibious assaults is 1000% better than it was in the base game or SF. Now, Japan is a real threat in the Pacific. The Italians are a threat in the Med. And the UK is a global threat to anyone who fails to garrison their assets properly. The only failed invasions (where I have not intervened directly to counter it at significant cost) I have seen in TFH are a bizarrely set up counter-invasion of Norway after the Germans took it (the AI send too many divisions to a port with small capacity and the invasion died on the vine) and an Allied invasion near Vladivostok after I goaded them into war (I was the Soviets). Again, the invasion withed on the vine because they didn't take a major port, so I massacred the Americans and went back to planning an invasion of Britain.
The number of successful AI invasions is staggering. I see Italy seriously threatened and compromised by Allied invasions half the time (the other half of the time, the UK gets tied down somewhere else). I see Japan take everything they want in the Pacific, and if no one stops them, they seize India. The only thing I've never seen the AI execute at all in TFH is Sea Lion.
Oh, and the USA usually executes Operation Torch like a pro, but to be honest, that's the easiest invasion in the game as Vichy isn't that difficult to overcome.
