I think that's a fair assessment. You have to consider few factors that may determine whether Tua plays in the game or not.
1) What if Jalen starts off hot, does what he was supposed to be doing... few gaffs here and there, but Game is tied 14-14 at halftime? When do you put Tua in?
2) What if Jalen is doing what he was supposed to do, but receivers dropping the balls, OL not blocking well?
3) What if Tua comes in a series and he struggles to move the offense? Is that it?
4) what if Jalen plays terrible and Tua plays terrible as well?
There are things I'll be looking for when practice starts Friday.