I'd say this in on par with an E bow, or at least rlly close. More damage but more delay, less ranged attack, but more STR (though no AGI+) and +5% WS damage (assuming you do 1k, that's an extra 50 per WS)
Assuming your not at the fstr2 cap that 2 extra str completely kills the 3 agi on Ebow on ws and obviously on regular shots not to mention the higher base dmg and the +ws dmg. The and if that delay makes the difference between a 5 and 6 hit build it doesn't really hurt as much