1 - Size - What would be a reasonable size limit?
3 to 5 meters i would say, more than that and you would be better off with a tank. one of the strengths of the MI/Mech concept is it would be able to go in and winkle dug in enemy out of thier holes. also mobility is an issue.
2 - Limbs - How many and what type?
Humanoid shape imo two arms, two legs, no tail.
One crew, nueral interface at high tech levels or same as a set of battle dress.
4 - Weaponry - Turrets, fixed mounts, and/or "swapable" arsenals for use by the arms? In the case of arm carried swapable weapons would you have a single type and carry ammo/power for it aboard or would it be disposable, or both?
over the shoulder mount missle launcher
set up to suit mission statement. one man in squad detailed as AA and given upgraded FC progs in onboard comp. launcher holds 10 missles.
left arm plasma gun man portable built in and powered by the mechs fusion core. back up weapon.
Mech carries a heavy weapon to taste and mission requirment much as a soldier in standard battle dress would. weapon is powered from the mechs core.
5 - Armor - How heavily armored? Maxed out for the tech level or dependant on variants (heavies, scouts, etc.)?
Maximum armor possible while maintaining mobility.
no scouts...uplink to ships in orbit or light armored SOG forces will supply intel. also mechs armor is covered with comoflage receptors that project what is behind the mech onto the front of the mech. <this tech is already here>
6 - Features - Would mechs be strictly combat vehicles or would you have troop carriers, supply mechs, evac/med mechs, and others?
Strickly combat, everything else would be more cheaply done by conventional vehicles.
Add to the list and expand on the points, I'm sure I'm missing a few things
7- deployment - how will these mechs be deployed?
launched from a mech transport ship from upper atmospher/near orbit. mechs are sealed inside ablative torpedoes and launched at the target. 2 in 3 torpedoes are blanks filled with chaff and ecm devices and are set to explode on the way down to cover the mechs approach.
Mech torpedo falls away at 500 feet. parachutes deploy to slow mech rate of decent down. at 100 feet parachutes release. at 25 feet mechs conta grav bounce pack kicks in to bring it gently to the ground.
8- how will the mech communicate?
Each mech team will have a fleet liason on station in orbit aboard the corvette feeding the mechs satelite data current intel and keeping them informed on know enemy movements. each mech will have the ability to call for orbital bombardment via uplink. in the case where mechs do not control orbit liason will operate from bunker and will be able to direct conventional arty or missle barrages to the mechs targets.
mechs will operate in a platoon of ten including on dedicated AA mech. each platoon can be broken down into five fire teams of two mechs each.
three platoons will equal a mech company
three companies plus HQ elements will equal a battalion.