I think despite the changes from the book, we are still going in a good direction with unanswered questions:
Why did Hari’s son kill him?
Did he stab him or was it a ruse or simply we have viewed something out of context and are not in full possession of the facts?
Who put the artifact with the null field?
I think We can reasonably assume that the first seldom crisis will soon be upon us and maybe will get some answers? But not without more questions.
I read somewhere that everything would make sense at the end of the of the season so we are meant to confused at this point. This show will benefit from multiple viewings. I already look forward to watching all 10 in a week as soon as they are all available
Well, one of the key points of the plan to be successful is no psicohistorians on Terminus. So, it was clear that neither Seldon nor Dornick were going to make it to the planet (or for the sake of the visuals, they'd been eaten by a horrific entity). I'm afraid there's no point in both killings, but to get our jaws open really down.
Who put the artifact with the null field?
I hope the artifact is the real vault, with Hari´s holograms and will open on the crisis. As Seldon said on the 2nd episode "Terminus was already the choice", so he may have sent some one put the vault in Terminus before they go to there.