I used a steam juicer on my last batch about 2 months back. It worked great, no worries regarding the glochids since steam juicing is no-touch and whole fruit. I thought I would need to slice them, but the juice came out just fine. The fruit turned a light beige at the end of the process, which was weird. The juice was the beautiful magenta it should have been. It did not taste cooked when cooled down, it tasted normal to me as if I had juiced them the non-steaming way. My fruit had been frozen whole in the freezer for a few weeks before I got around to juicing.
Lots of people boil them whole then blend and strain to get the juice also.