I don't know. I was against him in the past because mentally he was miles away to be a good GK for a top club, but apparently the experience with AS Roma, playing for particular fans with huge pressure, is helping him to become better on and off the pitch.
Petr Cech remains a great GK, a factor for us, but he is 35. We will need a new GK in the future (not long time) and Szczesny could be a good solution especially if there is a lack of qualities into the young GKs around the World. Apart Gigio Donnarumma, for the rest I don't see particular qualities watching other potential great stoppers like Timo Horn or Areola.
In my opinion, David Ospina will leave us at the end of the season to join a club which can guarantee to him a place into the XI. Martinez is good but his lack of experience is big. Szczesny is still young, has experience, loves the club and the team-mates love him. I will be not against the decision to keep Woji if Arsène will decide to reintegrate him.