Im going to disagree with Hamster, because but I do like the idea...

My theory about it is...
I have 30 units all ground with higher damage, that fight with 40 units that are meant to attack both, and have much lower defense and attack, I can win with ease. It would remove the need for space as a whole, because no one would either build all of one, and go with lots of hybrid units, and I just go ahead and ignore hybrid units and just go high power ground units, I win every time. As armies get larger the gap gets bigger..

Yes, of course, Prism. They can always make a unit which is the strongest in each category(sky and ground). But with a slight higher cost. If the attacker attacks as what Prism says :"that fight with 40 units that are meant to attack both". Then that means, the attacker din't use any Agents at all.

If the attacker sent an Agent before the attack, then the attacker uses 20 ships that is Anti-Ground. Although the attacker MAY not finish off your troops. But still able to loot away handfull.

Egg....

Anyway, if you raise the cost for the standard soldier that can't attack both, but still make a unit the is all purpose the only unit to build, Agents will be useless either way...I will even skip over the idea of using them, if this is implemented.

In short, cheaper unit, that can attack both, why get the higher cost unit that can only attack one....Wait..but everyone will be using ground, so lets just skip the idea again, because i am halfway across the Galaxy and space units can't get to me and pose a threat to my shields and ground battery. So don't build any space, just build high attack ground units, that will cost me slightly more, but will do five to six times as much work as anything else. They won't have any pure antiground, because people out they will have space, and everything, that will cause the weaker players to have to worry about that... I keep coming to the same issue that you keep assuming I will use them, and if I don't I have to pay more and remove all form of strategy from the game.. Because your trying to remove the idea of space, and ground... Either they are weaker and cost more, are they are not added at all.

I understand that..... T.T

I think its quite funny because from a logical point of view ground troops may can shoot interceptors but not the bigger battleships and destroyers cause mostly the shields are to strong^^
so my suggestion make it that way

... unless they infiltrate the big ship, like in the SG series

Let me hire some Col. O'Neils please!

but what if the defender plays a well balanced army, and.. lets say there is some mixture of ground troops and some ships that attack ground to support the ground troop. then the attacker's troop that only attacks ground unit will be overwhelmed by the ships. for eg. 30 ground troop attacks 15 ground troop of the same type and 15 anti ground ships ...... the defender should win, and the ships will sure survive. and the only disadvantage is the cost of the ships.

maybe when the attackers knows what has happened.. he sends some anti air ships and owns all the ships. well, in this suggestion at least there is no guaranteed winner or loser

Won't matter, because I won't have any hybrids.

Lets say Hybrid only had 5 damage, 5 HP Normal has 7 damage 7 hp....

I have 10 units

I do 70 damage,
you have
4 hybrids and 7 normal,
you still have more then me, and I still win...

70 over
69 and you have a majority of normal units, and two more units then me.

Lets throw Space into the mix.

Say Space Hybrid will do 14 damage and have 12 health, and normal will not matter in this case so..

I have 40 normal ground units, and you have 5 hybrid space units, 15 normal ground and 15 space hybrid..

I do 280 and can take 280
You do 275, and I only do damage too 180 damage, so my extra damage means I won the ground war,and you failed too kill my units...So I walk away with your resources.

Math here, says I only had 5 more units then you, yet I even overpowered the ground force, and still had used no hybrid or space hybrid...

Ok, im going to go back to the realism here... Your fighting a jet, can you short it down? Yes...

Now lets use this logic here, a "drone" is not bound by any physical means, so they is no way for any human, to keep up with a flying drone, that can shoot from beyond means of detection. Anyway, the larger the ship, the faster it is, the more firepower it has increased the chance anything that has to be light too attack, is likely unable to fight back...A marine will not be able to carry heavy equipment to attack, and bring resources back..With that includes, anything larger then a large fighter, it would become near impossible to bring a spacecraft down...