@philipat - I have no doubt you're firm in your conviction that there was no TS activity of consequence in the aircrafts flight path. I'm not so sure about the truth of the Lionair statement.
As we all know, the flight recording instruments will soon reveal all. I'm hazarding a WAG, that as it's fairly accurately recorded, that around 90% of aircraft crashes are pilot error - and that this was a totally brand-new aircraft - I'll wager the cockpit communications will be very revealing.