For me, the two biggest questions this season are whether the line holds up and how effectively the co-offensive coordinators handle game prep and playcalling. I'm less concerned about Tua other than whether he stays upright and has open receivers. One of the knocks against him coming out of college was that anybody would look great with the stable of #1 draft picks he had in his WR corps. Now, he has similar targets and folks are expecting him to regress? Nah. Give him time and somebody to throw to and let's see how he plays.
I’m more concerned about whether he can stay healthy for an entire season. Not sure the last time he didn’t miss time because of injuries. Hopefully an improved OL, improved weapons and de facto improved running game will help with that.