I think you're being a little harsh. One of the strengths of the series has been, I reckon, its ability to take a cliche and do something different. An asteroid, a bomb, a countdown... we've seen all of these a million times before. However, the asteroid was never artificial, the bomb never set by the good guys, the wires never the some colour through oversight...
Besides, I'm just happy to see an off-earth episode again. I was beginning to think they'd run out of money.
Oh, Jaxie: if you still haven't seen Armageddon, avoid it at all costs. It's hard to imagine a worse movie. I pray, in fact, that I never imagine a worse movie.