I personally really enjoyed this arc for all it's worth. But i also don't see this resolution as them starting to date or anything (at least not right away).
To me it just feels like they finally reconnected on the premise that Aki knows and accepts Shiho's feelings for her and, while not reciprocating outright (yet), wants to give their relationship the opportunity to develop from here on out. And Shiho finally letting go of her "if I can't be together with her i won't be in her life at all" attitude and being willing to see where said development will take them.