I guess I forgot to put in that we would obviously sign another LB, which is why I was saying he is going to be good in the next few seasons. Once you get injured once, sometimes it's hard to get back on the horse without falling off a couple of times. We have to keep him healthy which will hopefully lead to consistency.
TBH I really agree with you here, the only problem is that by not playing Szczęsny, it would be a waste. I think for the next season or two that we need an established GK, but Wenger is simply not going to do it. It would be too detrimental to Szczęsny, and chances are he would probably leave. He's shown before how bad he wants to start, and unless there is a guaranteed top league club who want to take him on loan and start him, I think it's better to take our chances and sign a GK in January if necessary.
While I see what you're going for, I think there are 2 or 3 guys that I listed (Lansbury, Frimpong) who are ready to play now. Maybe I am just being a little too much of an Arsenal fan here, but I think they are going to play a significant role next season, and be good backup players.
I think the biggest issue right now for any Arsenal fan is that none of this matters. No matter how much we talk and speculate, it won't mean shit till September 1st when we know for certain what we have. Right now you're taking the armageddon end of the world view. I honestly believe we can lose Cesc or Nasri and still be okay, as long as they are replaced. If they both leave, I am not so sure about that, but I have to trust we would sign replacements. I think in the next few days we will start to get some real light on just what's going to happen with those two. If Cesc stays, I believe that Wilshere and/or Ramsey both could slot into his position in the future. They are at the right age, and while they will probably never be Cesc quality (let's face it, he's one in a million) they can be good. I think our real issue is that left wing, especially if Nasri leaves. Arshavin has proven he isn't consistent enough to start there, and he will most likely be gone next season regardless. I think some of the rumors regarding left midfielders for us (Hazard, Mata) is a good sign. We never did replace Pires, and I think now is the time. But don't go all crazy just yet. If come September and things happen the way you believe they will, then I will pick up my pitchfork and join the hordes, but right now, I still have faith.