Well as of the last couple of versions Scirra / Ludei have basically ceased working together, so CocoonJS is no longer a means to release your game to iOS (this is the method I used for Jack B. Nimble...) however you still can use it, just without support or working plugins
So that leaves Ejecta (which ran like garbage when I used it last month) and PhoneGap. It seems Scirra are getting behind PhoneGap now, which is great because I pay an Adobe subscription, so it means I get to use that service without limits
However PhoneGap documentation hasn't been updated in 3 years and is therefore out of date and lacking the detail I was hoping for - I find jumping to and from windows and mac environments to be a pain, especially when I'm not
that comfortable with Xcode.
So I'm hoping I can just work out PhoneGap and that it provides the same performance as CocoonJS used to. The caveat being, my app will REQUIRE iOS8 from that point on, because it requires WebGL to be accessed natively rather than via a JS wrapper such as Ejecta or CocoonJS.
I'm probably rambling because this is a source of annoyance for me right now, because a lack of Game Center support is probably effecting my sales and word of mouth a fair bit. If you have any questions, just respond. I'll be in and about the thread over the next few days for sure