It would be very nice to setup our pivotal tracker integration on a product line. That way if a ticket moves between products in that product line it retains the integration that was configured for it.
Currently, integrations are set at the product level as features and releases do not exist at the product line level (and these are the primary data points used in integrations).
At this time, based on current priorities and community feedback, we are unlikely to make updates in this area. We hope you can understand