Deadpool, your question re: size vs. power gives me the opportunity to post something I've wanted to say every time Akers being "too small" or we need a back that is bigger came up.
We'd all want another Marshawn Lynch, obviously. Right?
Given the way he trucked people, came out of a pile for extra yards, stepped out of tackles, broke tackles, took multiple hits before going down, dumped people with (ask Joey Porter) with his straightarm, got yards after contact game after game, I'd guess he playeds at 235 or so. He played bigger than his size.
Marshawn Lynch stood 5'11" and weighed 215.
Cam Akers does none of the above as well as Beastmode, yet he's bigger at 5'11" and 217. Just a tad bigger, but he plays considerably smaller.