Why don't you just make new tech trees without the planetary invasion techs.
Maybe because, that would be something completely different than what I was hoping to find? I was pretty clear that I hoping to find something that slows down the AI basically having this rather critical tech basically right from the start. Taking it away entirely, would be likely be a lot simpler, but that is not the goal. I just want something that makes it more far more expensive and time consuming for the AI, to get their mitts on, and hey, if it applies to the player, Id be ok with that too.
I suppose it would be possible to seriously ramp up the cost, and its location in the tech-tree, but Im not really currently conversant with modding this game atm.
Planetary invasion is kind of a game changer, and I say this as someone who has experienced my HW being captured by the AI within less than an hour of gameplay on more than a few occasions, often accompanied by escorts I cannot hope to match, much less defeat.