Love the game, and this is simply a consumer request because I'm not sure it falls within the category of things that can be modded in. Not big forum user so apologies if this is in the wrong place.
Really, it's 2 requests but they're flip sides of the same coin. Primarily, the request is for a Planet Killer. We have massive planetary bombardment options, but we don't actually have the option to destroy a planet. This could take the form of anything from making the plant utterly inhabitable to the complete destruction of the gravity well and it's associated phase-lanes. Don't think I've ever seen a game that actually implements scorched earth warfare, and there may be a reason for that, but I feel it adds to the strategic depth of the game.
On the flip side, and surprisingly this might be a bit more "out there" as far as implementation for the game, is the ability to create planets, or given the implementation of planet killers rebuild them. Considering the limitations placed on the tech available in the game building whole planets is probably out of the scope of the game, and Vasari already have Phase lane stabiliziers it won't necessarily add much strategically. I suppose in the end it's mostly just a counter for the first request.
I'd imagine both techs would be pretty high end to research, and prohibitively expensive/difficult to implement tactically, maybe even only available situationally. Might have to "drop" a nearby moon/asteroid onto a planet to destroy it. With the addition of Diplomacy I would expect it to have significant effect on your diplomatic status. However, given the fact that we're already engaged in genocidal cross-species warfare, the prolonged nature of the war, and the no-mans-land nature of the fighting (in story since entrenchment) this feels like a natural step in the conflict.
Thoughts?