The network is not currently moving away towards wrestling and reality TV as in the past and has been doing more challenging original programming over more comfy stuff in the past like Eureka, Warehouse 13 and the like.
First off, I think you mean to say the network
is currently moving toward more challenging stuff.
Second, I disagree with the conventional wisdom that
Eureka and
Warehouse 13 were unworthy fluff. They were both terrific shows -- fanciful and with a lot a humor, but also clever and well-written and often with a lot of strong character drama. W13 in particular got pretty dark and powerful at times, though it lost its way in the final season.
As for
Eureka... well, there was a perception at the time that the network was moving away from science fiction, but it was more just that it was moving away from space opera and focusing on more Earthbound SF/fantasy. And
Eureka was very much a science fiction show, more than most, because it was actually
about science and scientists. The science may have been fanciful for the most part (although it got a little better in later seasons), but still, few shows have focused so heavily on scientist heroes actually doing science as a driving element of the stories.
It's also worth noting that, during this supposed "down" period when those "fluffy" shows were on, there were also more serious dramas airing at the same time.
Battlestar Galactica overlapped with
Eureka by three seasons. After it was gone, there were
Stargate Universe, Caprica, Being Human, Alphas, Continuum, Defiance, etc. The alleged interregnum was never actually lacking for challenging or un-"comfy" original programming. It's just that the dumber stuff that paid the bills for the smart stuff -- the wrestling and the reality TV and the parody monster movies that were dumb on purpose -- tended to overshadow it in people's attention.