Currently, there is none. That's what we are asking for. It doesn't make sense for JT at least to not be able to connect with other stations, in my opinion. Gyrospheres, on the other hand, could be counted, as they are remote-controlled.
Anyway, if we have two options (at least!) for food, shopping and fun, why do we only got one for transport??
I don't know which upgrades both transport and shops could have, unless you mean different skins for the buildings (in which case, yeah, I agree; and I would even be fine if those were made into a DLC, that would be a much more interesting one than new lifeless dinosaurs).
The actual merchandise is another interesting point. Maybe if the game was what it promised to be I would be willing to get something, but as it's more than a year old now and barely better than it was at launch I didn't even get neither Wu nor Claire DLCs so I am more willing to know where the future of the game lies first. Anyway, this point would be Universal's final choice and I'm confident they wouldn't allow it because they like to control all merchandise of their franchises.