Funny, for me I was happy for that to go nowhere after the episode. It’s so big and deep a revelation that it’d just be its own show in the end to pursue it further … which I liked … it felt like something so big that even in the Star Trek era it was going to take time and effort to just digest it … which was cool.
Plus in a way the point of the episode wasn’t the sci-fi but the ending dialogue between Picard and the romulan colander about the struggle to find common ground and peace.