Venocara
Banned
Stabilise the front sure. That is not at all the same thing as knocking Austria out.
The front was stabilised at First Monte Grappa (an excellent Italian victory against the odds) and won at Vittorio Veneto, which was nearly a year later.
Not as long as Germany is in a position to prop them (and the Bulgarians) up.
All the Central Powers were defeated in France and Belgium, when Germany became so hard-pressed there that she was unable to send forces to aid the others . Had she been less hard-pressed she would have been able to do this, and so keep them in the war. The Entente might overrun an Austrian (or Turkish) province or two, but there was no way any of the CPs could be knocked out unless/until Germany herself was on the ropes.
Not all. The Ottomans were not defeated on that front. And the Austrians would have been knocked out by the Italians. The Germans would have had to send an unreasonably large force to stop that from happening.
There was much fantasising in Entente circles about "knocking away the props", but this was based on a false premise. It was in fact Germany who propped her allies up, not vice versa. If/when she collapsed, they would of course go down with her - but only then. There was no way they could be detached from Germany while she was still holding her own.
But all of Germany’s allies fell out of the war before Germany did...
Captures generally come after an army gives up a battle as lost. Why would the KuK be nearly so pessimistic without the context of a failed Spring Offensive, and against a worse-supplied enemy? Actually, that's the one word that sums up what's off about your argument, context. You assume Vittorio Veneto was the default of what must have come of an Italian offensive in 1918, and ignore all the external factors that brought about that victory besides improvements in Italian leadership.
70% of artillery is still enough to win such a battle, as I said, maybe not as decisively (or completely) and maybe it would have taken longer, but it still would have happened.
And in any case, the battle might not have ever been fought if (like predicted) peace negotiations began in July/August/September 1918.