I agree with you, but I think you're over the top about it. The knock on Jonny has always been his structuring - he consistently shows little to no knowledge regarding songwriting/structuring, save for the last Emarosa album and Isles & Glaciers (who was all Vic anyway).
His physical ability is simply off the charts. This isn't a guy who has a good voice, and could be great with some training - Jonny has absurd talent, and could be phenomenal and unmatched with half a brain and some dedication. So yeah, his voice obviously carries him past his inability to take himself seriously, but we're talking about a rare level of talent.
I completely agree with what you said, but you have to remember the individual we're talking about. Craig is so full of himself that he would never take into consideration that he doesn't know what he's doing, so he's perpetually going to be an incredibly mediocre vocalist thats basking in 16 year olds that just hear a pretty voice. I'm not sure I would use the word talent as when I was growing up in music class I was always taught talent is something you learn and ability is what you're born with. I.e, Craig was born with the ability to be an insane vocalist with some crazy control. But he completely lacks the talent to put any of that to proper use.