I sure hope not, it is not needed.
I've been thinking about a modern rock-paper-scissors.
Basicly, now we have Infantry->cavalry->ranged->infantry
This becomes:
Infantry->tanks->machineguns/artillery->infantry
Still good!
This is how I see it.
Alright first things first.
1. The AI needs to be able to intercept with their aircraft and use airsweep properly. This is one thing I noticed playing the game recently. It is way too easy to get air superiority vs the AI. If that happens they simply have no chance. I simply just decimated any unit they brought out in the open with impunity. So, the first step is to make the AI better at using its airforces.
2. This is how artillery should be in my book. WWI artillery unit (setup) --> WWII self propelled artillery unit (no setup, that is the reason for a self propelled unit) --> Modern Era rocket artillery (again NO setup, the unit is self propelled) All these units upgrade to the next in line. If there is no WWII artillery unit, fine, but rocket artillery should certainly not need to setup.
3. I feel aircraft should stay about the same, but here is how I see things. Aircraft should be worried about AA and interceptors.
Bombers --> against any ground unit tanks/artillery/MGs/anti tank guns/infantry
Interceptors/AA --> bombers
Fighters --> against weaker ground units artillery/mgs/anti tank guns/infantry, of course with promotion they can become more effective vs tanks (armored vehicles)
AA/interceptors --> fighters (interceptors can still be effective vs fighters, but they should not be as vulnerable as bombers to interceptors. Interceptors vs fighters --> should depend on the experience of the units involved in air combat.) Of course a more experienced unit is better at doing its job, that is obvious.
4. Land units
Tanks --> infantry (Tanks should have a big advantage against infantry in open terrain)/artillery/MGs
Infantry --> tanks (when tanks attack infantry that is in fortified or in rugged terrain, they are more vulnerable)
Therefore, I would say that infantry attacking tanks in the open are at a disadvantage.
However, infantry attacking tanks that are fortified or in rugged terrain should have an advantage. Tanks that are in a fixed position, or in terrain where they cannot move around as easy, should be more vulnerable to infantry.
Anti tank guns/AA --> tanks/air units (single purpose support is right)
AA --> infantry/air units
MGs --> infantry (when infantry attack MGs, MGs should have the advantage.) MGs should be defensive units at first, until they get a promotion allowing them to attack. At least thats how I feel they should be dealt with.
When MGs can attack, and they will be able to in GnK. In open terrain vs infantry, MGs have the advantage, moreso than infantry that is fortified, or in rugged terrain.
Artillery --> infantry/MGs/AA/ antitank guns
This is getting complicated. Sorry for leaving anything out.