I propose that, not only should your seeds have static attributes that define their energy, attack, and speed, but they should affect other behind the scenes attributes as well.
Energy: Right now, I think this is just your seed's health. I propose that, depending on your seeds energy, once you go to take over an asteroid, it takes that into consideration as to how much energy of the core is depleted when a seed kamizazes. EG: The higher the seed energy, the more energy it takes away from the core, and vice versa. Also, I think seeds with higher energy should be produced slower from your trees.
Strength: Right now, I think this is just how strong your seed's attack is. I propose that the higher your attack is, the longer the distance your seed is able to attack, and vice versa. EG: Seeds of strength 5 attack at a base distance of X. Seeds of strength 6 attack at a base distance (some variable) times/plus X. Also, the higher your attack is, the greater the angle of attack you can make on enemy seeds.
Speed: Right now, I think this is just how fast your seed flys around. I propose that the higher your speed is, the higher your attack rate is. Also, having a higher speed should also grant you a chance of avoiding enemy attacks entirely.
What do you guys think?