Karstdvr,
If you're at max penetration with 1500 in one tank and 2500 in the other, then it is a skills problem. You have not been monitoring or managing your air properly. If you're diving aluminums, then you've violated thirds on the one side. If you're diving HP steels, then you've definitely violated thirds. Even diving LP steels (assuming a 2600 fill), you've violated thirds (but you haven't penetrated very far). This is not a diver I would want to go cave diving with.
Now don't get me wrong, if you want to dive two long hoses, go ahead. Myself, I don't see the need. It seems to me that the majority of open water divers are taught with two shorter hoses. Thousands of instructors and DMs dive this way each day. They are taught to donate their octo in an OOA situation. On more than one occasion, I've had another diver on my octo. Why, now at the tec level, are we saying we cannot figure out how to donate the long hose that is clipped to a d-ring? Should divers at this level not be more experienced and squared away?
I'm with Victor on this one. In fact, if we're not diving in a mixed team, we cave dive with two short hoses.