It has the same feature as in counter-strike when you buy weapon, you use keys 1..9 (and 0) to navigate through the menu.

When you open the menu:
1. Select Class / Resign Class merged (depending do you have class or not, one appears)
*avoid message you need to resign;
2. Add on gear (1 grade armor, Tiberium rifle, Combustion rifle..);
0. Surrender.

Select class submenu is divided as in aow2 wiki (this is very logical to people):
1. Free (1. Gunman, 2. Shotgunner, 3. Engineer, 4. Tiberium Harvester);
2. Basic combat (1. Machine gunner, 2. Rifleman, 3. SSG, 4. Minigunner);
3. Advanced combat (1. Commando, 2. Sniper, 3. Jumpjet, 4. Timecop, 5. Suicide bomber);
4. Chemical (1. Tiberium rifle, 2. Chem warrior);
5. Fire (1. Combustion rifle, 2. Flame thrower);
6. Laser;
7. Explosive;
8. Support (maybe move here Timecop and Suicide move).

- Because menu is wider there are less chances for confusion that can result in bad outcome like:
C4's are on the obelisk in SD and you try to select demolition expert and mistake result is (Blue) Red toilet destroyed. Or if I like to repeat SSG it will always be 8. 1. (for 250$ 1 grade armor) and 2. 3. (for the SSG) numeric keys to hit.

- You can easily remember which combination is for which classes for those you repeat frequently.

- 1. 2. and 8. usually offers lot of classes that don't depend on Barracks and RC.

- Apparently very different classes shouldn't be merged in generic.

looks like very good idea

indeed not bad at all its organize and i think it will work perfectly

Sounds pretty damn good I like this idea.

Only question is, will the Spawn room still be needed, and if so, how to Limit it to where it only works In the spawn room??

I guess he meant this menu will be shown up only when you use a terminal in the spawn room.