I have two things to add.
1. This growth could be a good scrapper power but dif then tank. A tank could get real big and whatnot of course but the scrapper application of this could be shrinking. You could adjust your size so that you can dodge attacks better. Kind of like the way Reflexes and ninjitsu work.
2. Have they considered an elastic defensive and offensive powers?
If anyone is wondeing how that would work, i have a possible idea.
Say you are attack, it hits your elastic body having a similair effect as invluner (but less effective) BUT to make up for that you have a chance it recoil. Certain attack that hit you have the chance of bouncing back and hitting the sender. (you could have dif types of powers have dif types of backlash ranging from cone shaped to just direct.
You could then also have some powers that make you elastic your body so that you can avoid more attacks. ( this cant be used at the same time as the invluner-like powers)
As for elastic melee it could work as a super strength(less powerful perhaps) but works almost long range. Not SUPER long range but perhaps not short range... a meduim range if you will. Certain punch attacks and kicking attacks.
Thats my idea for anther power set that i didnt see in this list so i dont know if its just not popular or if noone has posted it (i doubt that) or if people think itll be too weak or too powerful.