Of course there should be shows (and films) that cover a broad range of themes.And no Starbuck didn't knockup an angel.
In "The Return of Starbuck" it's ambiguous as to who Angela is, but the unproduced sequel ("The Wheel of Fire") specifically says she is one of the 'crew' of the Ship of Lights. But you are right, Starbuck didn't knock her up. She was already pregnant when he found her.
As for this new version, I'm all for it. You all know of my distaste for nuBSG. It was too depressing and grim for me. I want a BSG more like the original, which isn't afraid to simply be a rousing space adventure. Not everything has to be so damn serious.
But for each, they should (read must) take their premise seriously.
BSG absolutely didn't. Hell we on earth don't even have anything serious enough to compare it to. They witnessed the destruction of their species, on a interplanetary scale.
To have just a space adventure show is ludicrous. Now you might not like Moore's remake (and there are certain elements that I didn't care for), it at least held true to its premise (well technically it should have been even darker, but still).
Take Star Trek Voyager, one of the reasons that show failed (by many trek fans) is that it didn't respect its premise. The writers weren't allowed (and yes they did pitch the ideas as both part of the writers staff and as the head writer and executive producer) to take the situation that they were in in a serious manner.
Now that doesn't mean that they can't have a big action film, but it should absolutely be dark, serious and exceptionally moody.
But an adventure film, sorry that will not work with its premise, period.