He had an almost 10 ypc average. I'm not sure you know what you're talking about there, 5 yards? Considering he never has been that guy to explode for 50 yards(he's not really done that much over his career) his longest last year was 35, so yeah he can get those 30 yard gains, and does. Here is his longest reception by year over the past four starting with last year:
35
35
34
34
He's pretty much the definition of consistent(year before that his longest was 36).
Williams does like to body catch, but he had more catches, more tds, more first downs and a longer yardage reception than Butler. He can extend. Look no further than his 3rd down catch in Seattle a couple years ago.
Beasley isn't explosive downfield as he's not as fast, and he's not used that way much, but within 10 yards of the line of scrimmage he's probably the most explosive receiver in the east in that regard. He just can't be covered because of his agility. He also had more catches, more yards, more touchdowns and a better average than Butler.
Butler said it himself, he's just a regular player. Not the worst and not the best. Just regular. By his own definition of himself, he is just a guy.