It is far too early to give up on a first round pick with as much natural talent as DeAndre Baker. He struggled on a couple of deep passes in Week One, in part because he failed to get his hands on Michael Gallup and Amari Cooper when he was pressing them at the line of scrimmage. It is a technique he was very proficient at in college and can be corrected with work on the practice field.
It's possible Ballentine could see the field instead of Antonio Hamilton, but based on what head coach Pat Shurmur said this week, Baker will probably be in more of a full-time role. I do not expect Julian Love to take snaps from Grant Haley in the slot, or in place of veteran safeties Antoine Bethea or Jabrill Peppers.
You probably aren't going to like my answer to this question. The Bills defense has few weaknesses from a personnel or schematic standpoint. They can rush the passer with four and have a creative blitz scheme. Their defensive backs can cover in man or zone schemes. They have fast linebackers. They are good on third down. They don't allow big plays. They force turnovers.
Their one weakness based on their 2018 performance was their red zone defense. They allowed offenses to score touchdowns on 71% of their trips into the red zone, the third-worst rate in the league. It is difficult to move the ball down the field on the Bills, but once in the red zone, they can be scored upon.