Um....ok. that mistake i described is exactly what you described, Horizons being optional meant that it was disconnected, developed with a different mandate then the rest of the game.
So asking for them to repeat it is asking them to create Oddysey disconnected like horizons was.
So you seem to be contradicting yourself and im not sure what youre asking for.
I probably quoted the wrong person then!
To be honest, I'd prefer they just made you HAVE to have odyssey to even play. Then they could link everything without having to mess about.