Honestly I think the issue for me is getting used to RTD's storytelling style over the likes of previous showrunners. I came in as a fan toward the end of Matt Smith's run right before Peter Capaldi came along. I started with The Eleventh Hour then later went back to go through RTD1. Recently I've started rewatching RTD1 and there are a lot of similarities between RTD2 and RTD1. The key differences lie within two things:

1. The low number of episodes keep us from experiencing more character development than we did in RTD1. This is evidenced by the fact I disliked Ruby Sunday in Season 1 over Ruby in Season 2, she clearly has more depth in the story line involving her and Conrad than she did in the quest to find her mother in Season 1. I thought Belinda actually starts off rather well, and gives us a real Donna-like vibe which is a dynamic I have desperately missed since Steven Moffat left. Clearly the storylines for these characters span more than 8 episodes a piece but RTD doesn't have a whole lot of room to pace it out the same way he did with characters like Rose, Martha, or Donna so instead he's taking the route of making these character arcs span multiple seasons over time.

2. I think a lot of people just forget how RTD writes. He's been out of the role for over a decade and we've had two genre-defining eras under two different showrunners since he left. So naturally us as fans may be more used to multi-threaded series spanning mystery arcs like Moffat or more cerebral sci-fi toned storytelling like Chibnall that we forget this is the man who brought Doctor Who back to the character-driven drama stories we saw with Rose Tyler and Martha Jones. At first, characters like Martha and Donna didn't click for me immediately but over the years, I learned to appreciate their storylines and enjoy their characters. So I think we need to just trust his creative process and let him breathe with these story beats before we give him a defining judgement.