One thing I don't like is that you have the CHOICE to suck.
I'd have preferred the PHB to rule that (A) you must have at least a 16 in your prime attack stat and (B) At level 4, 8, and so on, you may boost your prime attack stat and one additional stat of your choice.
With the return to strong archetypes in 4E, I'm sorry -- Fighters are Strong, Wizards are Smart, and Rogues are Nimble. If you want to play a character with 10 STR, don't play a fighter. The only potential snag comes with the dual-attribute stats like clerics who can choose between WIS and STR (both or either!), but that is easily worked through if you just say that ONE of the stats must be considered a "prime requisite."
Instead, you have the option to start with a 14 in your prime attack stat and never pump it, except for the two mandatory increases as you tier up. And some people may not realize that there is something wrong with that, and consequently be frustrated when they suck.