I thought the writing was pretty stilted and too on-the-nose but as others have said, it is the pilot and pilots tend to try too hard and over-explain way too much, so I'll give it another few episodes and see how I feel. Michael Sheen made me laugh a few times, and he had a terrific creepy energy in all his scenes, so I did like that.
What I think I'd find more interesting is if they spend all this time showing us that we should be worried about Malcolm being his father's son and descending into madness and violence... and in the end it turns out that his sister is the one who cracks. She's the one her mom referred to as "perfect" and not the one to worry about. So it would be more interesting, I think, if we worry about Malcolm but eventually start to see that he's the safe one, because he's so worried and anxious about NOT becoming his father that he goes to extremes to make sure that will never happen. Meanwhile, his sister seems pretty blasé about it, maybe because she never knew her dad? So it would be interesting if they gave her some depth and we slowly but surely start to see her shift and change and become altered.
And then we wonder, just which one is the true monster and did they inherit that from their father, and can it be stopped?