I have read several post about how an additional QB would take away reps from Tate/Denard and it is simply not true. I've played college football so I know what a standard pratice consist of and the more QBs you can have the better!
Most of the time when you are working on routes with the QBs/Wrs you divide the field in half and have guys running routes on both sides with two QBs throwing at the same time. So because Sheridan was out the latter part of spring, that part of pratice would basically consist of 3 QBs doing all the throwing which is not good for sore arms. The more guys that are able to throw, the more routes that can be run and the more balls that can be caught...that is a good thing!
Also, having several QBs to work hand handoffs with the running backs is beneficial...the more guys you have, the more pratice you get. And Tate will still be the one working with Minor/Brown/Grady.
Tate/Denard are still going to get all the reps with the 1st and 2nd team...everyone knows Cone and Kenndey aren't taking these reps and an additional wouldn't either. While I have mixed feelings about bringing in Paulus, I don't believe RR is thinking anything other than bringing in an additional arm...he would be using Paulus as much as Paulus would be using us. That is the reason NFL teams have like 6 QBs in training camp and probably why the Packers worked Paulus out in the first place.