I'd rather have Stidham throwing INT in practice while figuring out things with receivers and reads, than doing it in games.
Considering that he is throwing against the best NFL secondary its not really a surprise that he will have some balls picked by the CBs/Ss.
If he gets to learn something of this INT throws in practice it will benefit his decision making in games and later on in his carreer, so its not all that bad.
Whats worrying a bit (at least for me) is that the goal line offense seemed to destroy the D-Line in practice. Which might not be a good sign for the D-Line.
After the offense was horrible last year on goal-line action, I am not sure whether they made a huge leap by now or if the D-Line is even weaker than last year, I'd almost guess the later one so far...