These are rational arguments for non-ObjC developers to be pissed at Apple. None of them are arguments for APPLE to change its policy. In the medium term it is clearly better for Apple's interests to implement 3.3.1, to maintain control over platform and encourage differentiation of its hardware (the way it makes most of its money!). In the medium term, they have more great developers than you can shake a stick at, so they won't cry about losing a few thousand more.

The only real argument that makes sense is that long-term, enough developer goodwill will be lost that they will go flock to a better platform and eventually tip the balance against iOS. That certainly will not be for the next 3-5 years, which is an eternity in tech.

I am not an iOS developer nor do I own Apple stock, so I'm just calling it like I see it. In short, it's a great business decision for them and I really doubt developers will make them pay for it, either short or medium term.