Our group was really stressful at the start aswell.
We had an idea, it was strong and we could have done heaps with it, but then the other three members of my group had to change, so I went with it as I didn't really have a choice.
Anyway, they came up with another idea that I thought was pretty weak and we've strengthened it now, but it still could be better. It's hard trying to be enthusiastic about something that you don't think will work. I put in ideas with mine, but it was difficult because the whole concept was quite shaky for awhile. All the same, it's better now, but it was very rushed and being in a position where your not sure where everythings going to be done on time, especially when you have heaps of other workd both inside and outside of school to do.
I personally, don't think they should have group work in the HSC, not to say i don't like group work, but it's very touch and go and considering all the things they put in place to ensure they you can get everything on time etc, its sort of wasted on group work because so much can go wrong.