Veteran fleets and researchable WMD

There's one thing i've noticed about most strategy games is that specific units eventually rank up or properly known as gaining veterancy after doing specific things or destroying set amount of enemies. Veterancy usually comes in 3 phases, with each phase giving small benefits ie. increased accuracy and damage output. If this were implemented into ES2, you could have more ways of gaining veterancy other than combat, with each faction having their own unique ways like UE get faster veterancy through combat and colonizing while Sophons gain them faster by colonizing and discovery. Implementing this system could give players a reward for managing their fleets. (No self-entitled Emperor would pass up for his own personal elite fleet that he could call on if things go down). 

Another thing that bugs me is that there is no WMDs in game yet. Would be nice to have this as an endgame researchable weapon, which can only be mounted on dreadnaughts which sacrifices around 80-90% of its firepower or create an entirely new ship for this purpose. The weapon can be used for fleet to fleet combat or destruction of a planet to deny resources if one can't defend conquered planet. It can only be fired by player decision (similar to how the US president has supreme control over all nukes). This can be done by choosing an option in the pre-battle set up.I fleet vs fleet, using the weapon wouldn't be OHKO (chance of missing some ships) instead it deals set amount of damage where full health dreadnaughts could survive with any ship lower than battleships is instantly destroyed if hit. After using it, the weapon goes on cooldown for set amount of turns.