clicks of life hardly represent a characters actual power levels/durability these days so that point is moot (when Bane has more health than venom, etc...)

doc should at least have opening reducers to represent the extra protection his metal(vibranium/adamantium) arms give him

Yes. Though probably nothing more than a few clicks of toughness. He should also some CR &/or ESD. He should be hard to hit.

I'd like some power that states when moving within 2 squares of him you must stop moving. Those tentacles should be able to slow down almost anyone who wants to get close.

You are incorrect. Giant Reach states:
"This character adds 1 to its d6 roll when breaking away. This character can use the Carry ability. When this character is given an action that includes a close combat attack, all squares within a range of 2 and line of fire are considered adjacent. This ability can’t be countered."
Plasticity is not an action and therefore cannot activate Giant Reach, and even if it could, only Doctor Octopus would treat the squares within his Giant Reach radius as adjacent, not anyone moving through it.

On a different note, as others have said, I was hoping for a better representation of the Doctor. He's a genius, and a meager Outwit doesn't cut it. This is a man who's pulled off plots like marrying Aunt May, convincing the world he's suddenly philanthropic on his deathbed, and straight up stealing the body of Spider-Man. He needs some kind of super Outwit, Perplex, and some kind of range with Sharpshooter. He needs a better improved movement and he needs reducers and ESD/CR. Some sort of attack power would have been great too, like Precision Strike or Blades. Just something. This is Doctor Octopus, one of Spider-Man's greatest villains. He's just too much of a pushover.