I have an opinion of Taysom which is not necessarily reflected in the argument I am putting forth. I personally want to see him be the staring QB next season. I am sure people will reply that he can't play QB in the NFL, and that he fumbles too much; more on that in a bit.
But this so dubbed "joker" position, it is just a gimmick. Sure, it is cool and exciting to see this one guy do all these things, and hear the announcers say "the Saints have a QB doing this and that", but jack of all trades, master of none. The Saints have better ball runners and better ball catchers/route runners than Taysom. He doesn't bring anything special to running the ball or catching passes, other than the excitement of "having a QB doing this and that". Again, other players on the roster can run the ball better and catch the ball/run routes better than Taysom.
The true value of Taysom, x's and o's wise, is that he can run the ball from the QB position, and substitute a position in a pinch.
But then, if you (the generic you) don't think he can play QB (pass the ball effectively), and he fumbles too much, then why would you want to see him running the ball, or catching passes, or throwing the ball?