We got demolished at Adelaide and Sydney but Indian bowlers actually outbowled the Australian pacers in dismissing the top and middle order at Brisbane and Melbourne. The stats will be a bit distorted due to Smith's Bradmanesque form in the series. But apart from him, the rest weren't as consistent. Warner played 2 brilliant knocks in the first and the last match but generally wasn't as consistent as Smith. Rogers was consistent with his 50s but didn't kick on to make big scores.
Australia were 240/6 at Brisbane and 210/5 (then 320/6) at MCG in their first innings. Where we lost in dismissing the Australian lower order cheaply. Johnson came at 240/6 at the Gabba and was sledged by Rohit Sharma. He promptly went on belt our bowlers to all parts making some 70 odd helping Australia reach 500+. Again a similar case at Melbourne with Harris playing Johnson's role making another 70 odd with Johnson himself chipping in with a 30 odd score again helping Australia reach a 500+ score in their first innings. Unless our bowlers are clinical and bowl out Australia for under 350 or 370 at max, the chances of winning against them at home are very low.
I think we have a decent pace attack atm. Shami is a bowler who can be trusted to perform in Australia. I have seen Yadav make very good improvement in his line and length, and although his figures may not indicate it, he troubled the English batsmen and beat their bat quite frequently with fielders spilling the chances created.

Anyway it's one thing bowling in India while it's different bowling in Australia. Ishant has become a consistent workhorse which is a good thing. Bhuvi will be useless on most current Australian tracks with his pace and height due to their flatness.
If we receive tracks similar to the ones in the Aus-SA series, I would go with an attack of Shami/Yadav/Bhuvi/Pandya/Ashwin.
If we receive tracks similar to the ones in the Aus-Pak series (which is far likely), I would go with Shami/Yadav/Ishant/Ashwin/Jaddu. Bhuvi will be useless if we receive roads where we will need hit the deck bowlers and Jaddu to bowl dry and create pressure.
Anyway, you need 3 good pacers to win in Australia. Shami is good. Yadav and Ishant are decent, but not great. Our success in Australia depends on the 2nd and 3rd pacer.