Well, the new update seems to set back the fps in most cases so in my opinion it is not whining to let Ludei (and Scirra) know about it. That said, of course we should always optimize and test our games all the time if planning to release on mobile. At this point I have tried every trick in the book to make my game run faster with the version 1.4 but still 1.3 works better in all devices I tested my game on. I have also made new test projects to see if the problem persists, and it really seems that there is something fishy in the 1.4 version - even the simplest projects seem to lag a lot more than before.
I am not worried tho, we all just have to wait patiently and see what Ludei has to say about this and then make conclusions!