Hey,
I just got the BETA recently so there's a possibility that there's a way to do this that I just haven't come across yet, but I noticed one thing that I didn't like. When setting up my galaxy, I found that in order to change what victory conditions were on or off, I had to pick a scenario. For example: in order to turn off research victory, I have to be in a "Battle of the Gods" right from the beginning. I'd rather just turn it off.
I'd recommend a custom scenario in which you can toggle each victory condition on or off individually. Of course, if it's way to late to recommend this, I could always give those scenarios another try.