Having now seen both episodes, I'm baffled as to why there's a lot of negativity about it. I think it's well acted, looks fantastic, the pacing is good and the script is fine. The beach scenes last night were absolutely compelling - you really got a sense of the chaos and despair. Fabulous CGI there. I loved it. I also don't see that the "modern" bits are in any way a distraction or an annoyance, to me they seemed fairly subtle and quite intriguing - also, historically correct. Last night's episode even gave a subtle and very effective nod to one of HG Wells' main themes, the madness and destructive violence of colonial Britain. It really made you think about what Britain did in Tasmania, not to mention the rest of Australia.
My only grumble is that I didn't at first get the relevance of the red-themed "flash-forwards," but episode two brilliantly put that into perspective with speeches about turning the Earth into a new Mars. I suppose the Martians would call that Marsiforming?
In conclusion; really good, and I can't wait for episode three!