I always saw the 'no using Wis/Int/Cha skill checks' to be more akin to a Battle Mind (http://tvtropes.org/pmwiki/pmwiki.php/Main/TranquilFury) sort of effect, where the character in question 'becomes' the blade, so to speak.<br/><br/>And the bloodline<em> does</em>give you a bigger chakra pool, with that Con bonuses. ;)