Which degree is more suitable for information systems / IT business/systems analyst roles?

I think deciding what exactly you want to do long term is the question you want to answer. They are ultimately the same. Why are you shifting to information systems? Do you want to work in information systems? Is there a demand in your area for any of these degrees? Which one will get you the best return on your investment? Which one do you find that is stimulating?

I'll reiterate what I said in another thread about CS vs. IT vs. IS: largely the degrees overlap and can usually get the same jobs after graduation.

The distinction between the three is that CS focuses on programming and software engineering, IT focuses on working directly with tech infrastructure and IS does some of both of those things while adding in general business concepts and IT project management concepts (IS was my degree -- be prepared to make a lot of charts!).

But -in most cases- all three will have similar starting points post-graduation and can apply for the same jobs (anything that says 'CS or related degree' or any combination of the three, IS and IT graduates can comfortably apply for and vice-versa).

Of the degrees you listed I think the Swinburne one caught my eye the most with regards to course structure, but I am not sure if that's because Deakin's site design is awful (too much scrolling/spacing/things to close to get to the core content). You could become a Systems Analyst or Business Analyst with any of those degrees (although YMMV as I'm in the US and you seem to be in Australia, not sure of the market there).