I'm sure this has been discussed before but I can't figure out what keywords to use to find it.
I want more UFO sizes to attack your base, so it's not always a battleship, especially earlier on. If I could make first or second-month attacks tend toward being a large scout, then there'd be some purpose for installing 1-2 missile defense early in the game. As it stands, it's plasma or fusion defense, before that no point in putting up any at all. Also, battleships traveling 5000 knots have a high chance of avoiding detection all the way to your base, while any slower ship has a much higher chance of being detected in transit, giving you a chance to react and shoot it down. Lastly, most ships can be caught by Firestorm but battleship can only be caught by Avenger.
Ideally I'd like to be able to make all of these changes:
1.) make final retaliation ship spawn type vary
2.) make ship type choice weighted based on progression (maybe alien tech level)
3.) make alien deployment depend on the attacking ship
If I can do at least the first piece, I'll be happy. If the attacking ship varied between battleship and terror ship, there's no need to change the deployment since their crews are roughly equal, but the hit points of the incoming ship would depend greatly on which ship was attacking you.