1. Yes. 30% damage reduction does not give very much, if you focused by zerg, and in 1 vs 1 - there is too much interrupts in this game.
2. No. Damage is fine, though i never have criticals like melee class (5-11k AoE damage, and a week ago JG Mayhem has critted for 7100, so it's still possible after 1.1), or burn all hp down in 6-7 seconds like powertech in pyro do. Still, damage is fine.
3. Yes. Cryo grenade/electric dart for 4 second, knockback and 8 seconds stun, if noone hit target.
4. Yes. Every melee class in game can close the distance in a one..two...three. Force jumps/charges/battle cloak/act of dissapearing/etcetera etcetera. And if you in gunnery/arsenal - it's bad. TM/GR - 1.5 casttime + 0.5s animation, very easy to interrupt.
5. No. Armor debuff is awesome.
That's my point of view.
And sometimes, i think that Bioware wants Commando to become only PvE chars.