Ground Vehicles Required in PS2?

[Akadios]

I have been kicking this around in my head for a bit. Are ground vehicles really going to be necessary? What I mean by this is not in the general zerg sense but in a more organized outfit sense.

Changes from PS1 that brought this line of thought on:

Galaxy's ability to deploy as an AMS
The ability to spawn on your squad leader
The ability to spec out aircraft for anti-vehicle roles


The concept of a ground vehicle less structure:

25 or so Empire Specific fighters
15 or so anti-vehicle reavers
10 or so anti-infantry reavers
10 or So Galaxies filled with infantry (1 full platoon ie. 100 infantry)

The question: With the above setup is there really a need to have an armor column if it meant you had to remove some of these assets and couldn't remove infantry? Would there be any reason that ground vehicles would be better than fighters, reavers, or gals?