well, i suppose the whole " 2 docking collars" thing makes more sense when diplayed like that, the old battlespace stuff indicated large dropships (+60,000 tons) needed two collars as well.
that's still a fair chunk of dropships they can't fly with tho, the ubiqitous
merchant class to name one.
side note, that's propably a
Invader class ship.
The new rules don't have a "tons > X require two docking collars" requirement, but there is a
quirk that applies to Dropships that can make them use one docking collar but impinge into the space of the second enough that it can't be used.
I'd think that would be a quirk of the jumpship, too. Looking at the vid/picture, you'd think that the problem of using two docking collars by a large dropship would be solved if the fore set of docking collars was offset by 90 degrees from the aft set of docking collars along the longitudinal axis. Actually mating to two docking collars simultaneously (perhaps as a way to zero-out the impact of having the Leopard piggy-back on the Argo) would also mean, engineering-wise, that the Argo could only use jumpships that have two docking collars, in-line and a specific distance apart. That would support your thesis.
I do like the enticingly empty docking spot on the port-hand side of the Argo that looks like it is just LUSTING to have a second Leopard docked there. (OK, I just re-read what I just wrote and I am purposely electing to leave it as-is but I am NOT taking that train of thought to the next station.) I am hoping there are some in-success expansion opportunities for double lance missions in the offing, or maybe some 'split the party' missions where you still do one lance at a time, but the mechs/pilots you pick for first mission can't be used for second mission and the results of both missions combine into overall success/failure/plot direction.