See that's exactly the problem - the implication that they can't be together if she was giant, that there was no hope of them having a "real" relationship unless that relationship was a "normal" one. It's like queerbaiting for giantess fans.
That being said, This chapter actually makes me a bit more optimistic. A lot of my irritation in the comments of the last chapter came from me mistakenly thinking that chapter 62 was going to be the final chapter. Having Chieri turn "normal" with one chapter left was basically a guarantee that that was endgame, but now we have the actual second to last chapter and it has Chieri missing her height, and Yumeji missing the relationship they had when she was big. It's often easy to tell how the final chapter will go from how the second to last chapter ends, and I think this is actually looking good for a "Chieri gets big again" finale, which would actually be the best possible ending for this series, because it would be one where Chieri deliberately chooses to be big.