Brissett is getting better every game, against tough conditions. I would say he would have an entire season of showcasing what he can become and right now, he has far exceeded my expectations of being able to at least give us a "chance" to win most games. You couldn't say that about the Browns QB or the 49ers QB or freaking Brian Hoyer who couldn't win with SF, or with even Eli. Plus, all of those had attended full training camps with their team, for crying out loud, before they stunk.
Brissett, along with the others, probably because of a lot of youth infused into this team by design, has to learn to finish and that is to be expected with a team that suddenly got younger, IMO, people tend to ignore that. However, there is a difference between a vet QB Philip Rivers led team not being able to finish games vs a young QB like Brissett not being able to finish games. That is why, when you do an objective comparison, beyond the QB passer rating and stats, he might be the best back up QB in the league when Luck comes back, IMO with a season of weathering under his belt.