Tyler isn't a predictor, nor is he being portrayed as one. I get that some people are creeped out by it, but I think they have written Tyler in the right way to show that he isn't a sexual predator preying on teenage girls. I don't think they are condoning it, as Brad and Terese certainly aren't, and Ben had reservations, too. I think the whole point of the story is to ask if it is morally wrong for Tyler to date a 16 year old. They have shown that he does really like her, and judging from what people are saying, not everyone thinks it's wrong. Not every story should be written in black and white, and I like that this is a grey area and creates debate.
I think it's way too easy to label Steph as bi. Sexuality isn't necessarily fixed; she's what I would call sexually fluid. Personally, I view sexuality as being on a spectrum. Whether or not Belinda took advantage of her is debatable - the show has written it as being two people who clicked and then fell in love, mentioning how nothing happened until Steph was released - but at best she didn't do anything to rebuff her or Steph's feelings. Besides, even if Belinda did take advantage of Steph, it's not like she could make Steph want to be with her unless she really did have feelings for her. We saw what Steph was like after she was released, and she was in full control.
ETA: Belinda lost her licence due to her relationship with Steph. Conducting a sexual relationship with a former patient is forbidden.
Paige is selfish, but they have done a poor job of writing her with any kind of character. Her not believing in God should be a major hurdle and one that should have been mentioned weeks ago to highlight her lack of understanding of Jack's faith.
Paul does care about Steph, but his brand of caring has always been a selfish one. We saw how he meddled in Daniel's, Andrew's, Elle's, Rebecca's and Declan's, Gail's, Izzy's, and Amy's lives and all from a place of care, which is always motivated by his own selfish ideals of what he thinks is best for those he cares about. That's how Paul works. If he didn't care, he wouldn't interfere.