As mentioned above, yes the older locks are in use and if you want the true experience find a CL that still has a ship that fits, Disney does not. The new locks are boring..
I think most HAL cruises are still using the old locks. One thing that can mess things up is the water shortage that Panama has experienced so there may not be a guarantee that they will use the old locks. The new locks reclaim a large majority of the water so the CL may be required to go the new route.
GET UP TO A $1000 SHIPBOARD CREDIT AND AN EXCLUSIVE GIFT!
If you make your Disney Cruise Line reservation with Dreams Unlimited Travel you’ll receive these incredible shipboard credits to spend on your cruise!