"Unbelievable"?

Jon's voice is improving, indeed, but it's still awful.

These Days was so badly butchered it was funny.

Bed Of Roses and I'll Be There For You were basically shout fests with no vocal resonance or smoothness behind them at all.

The part of ITA you suggested us to watch was pretty decent, but sounded very forced. His voice even seemed to crack a bit at the start of the (easy) long note.

I'm sorry, but Jon's done. Those vocals are literally embarrassing.