I agree that television Scifi is in very bad shape. I still don't get the reason why that is. Due to computertechnic, it's certainly no longer a cost factor, it's more a matter of bad authors.
Most of the stuff you people talk about here, doesn't even make it across the Ocean, and germany isn't that 3rd world actually

I think BSG made it only to Season 2 (if ever), Caprica I don't even know.
Example : I liked the extremly cool and modern special effects and CGI from BSG, even if I never get if there was a connection between the original or not, but I doubt there is, since it's more a remake. But which idiot brought up the idea, that the cylons have had an evolution towards sex addicted humans at all ? Also , the choice of actors was pretty bad in my opinion. Maybe the authors should have watched a little more at youporn, so they could have let them out of the series (not that I don't like stuff liked that, but when I want sex, I don't watch a scifi show)
There are so many good scifis out there, I don't get it why no one is able to create something. StarWars, Battletech, BSG, WingCommander, Spinoffs from those, there is so much possible.
However, it's often a case how long series exists. Example : I'm a big stargate fan. The orginal was very good and famous in germany, maybe except the stupid Ori part, that was a shot over the finish line.
SG Atlantis I didn't liked from the first season, but this series developed, and with the following seasons I really start to like it (mostly), actors also got better.
Fazit : I don't think it's a matter of the audience vanishing, but it's the authors that really suck nowadays

(not in case of SGU maybe, except the command chain fighting, I found the plot quite interesting)