I don't think you should be seriously considering changing degrees because of breadth. Nobody I know hates the breadth subjects for damaging their GPA. Assuming you do the bare minimum of 4 breadth, given the weighting of subjects it works out to only be 12.5% (1/8th) of your 3 year GPA. There are breadth subjects that are great, there are breadth subjects that are horrible (you can replace breadth with science elective).
I personally love the breadth program, but I can appreciate how you'd be intimidated if you don't like essay writing - there are plenty of breadth that don't require it and you can do well in. If you don't mind being bored for a semester, do introductory microeconomics because it's really not that hard. That said, get used to writing essays and reports because you'll have to do it, even in science/biomed. I probably wrote 5-6000 words of reports this semester.
Yes you definitely need to do science/biomed at melbourne doing biology/chemistry subjects in order to do MD at melbourne, but not other degrees
You can theoretically do it through breadth in any other degree but if you're going to do that, I'm not sure why you wouldn't just go BSc in the first place.
That is fine. Like I said, it would take a lot for me to even consider Monash. So only 4 breadth subjects over the whole degree? I have no issue with that. I thought it was like four per year or something.

One subject outside of science per semester will be a nice break. I will just need to choose between biomed and science, but as vexx says, I am not at all keen on plant biology, so still leaning towards biomed. The rest seems pretty standard (physics and chem) and then after that everything is related to human biology which I know that I will enjoy. Calculus will also break things up nicely.

Just wanted to be sure, because I know I will need a relatively good GPA that is all.

I hope you're not saying what i think you're saying... choosing subjects purely for GPA? Pick what you enjoy and you WILL get into med. Don't mickey your way through, that's what fags do.
Aren't you going to Monash?

And no, I am not choosing them purely for GPA, but I need to ensure I can do well in them. It is in everyones interest to play the system to an extent, rather than what happened in VCE where I lacked sufficient knowledge about the system until it was too late and got dudded everywhere. (no lote, no spesh maths, no extra year 11 3/4s, no enhancement subs etc.)