I think it's important that you check the skill shortage lists on the Australian government's website to see if your profession is affected. Once you have a clearer picture of what's going on then you can come up with a plan, but unfortunately the gist of the situation is that you may well find it more difficult to move to Australia now. Good luck.
Unfortunately the new visa rules have been implemented quite suddenly – because of this, it's very difficult to tell what the long-term effects are going to be, especially for current 457 visa holders such as yourself.
I did manage to find a recently published article by the Huffington Post which you may find helpful. It details a case similar to yours. (Please click here to read the article.)
Hope this helps somewhat. Sorry I couldn't be more specific – in these situations it can be hard to tell what the long-term effects will be. Best of luck.