Dear Vyd,
Many thanks for these follow-up thoughts.
Yes, as I read Kant, there's more to K's doctrine of space than the fact that space is necessary a priori form of intuitional/sensible representation: for me, the best interpretation of K's doctrine of space is that forms of intuition are also veridical representations of manifestly real space & manifestly real time as abstract structures immanent in the manifestly real world.
I present & defend that interpretation in, e.g., ch. 6 of this book--
https://www.academia.edu/21558510/Kant_Science_and_Human_Nature_OUP_2006_
& chs. 7-8 of this book--
Best wishes,
Bob