There is really only one sensible solution. All captive orcas in the US must be retired: not to bigger incarcerating pools, but to coastal sea pens, where they can, at least, live out the remainder of their natural lives in something close to natural freedom.
We know for certain that orcas don't thrive in captivity; they lead miserable, confined lives. They can't swim 100 miles per day; they can't dive 300 feet below the surface; they can't live in pods 40 individuals large; they can't be free.
Perhaps the most interesting aspect of the announcement, from my perspective, is that SeaWorld San Diego's President and CEO, Joel Manby, says that he's listening to SeaWorld's guests. It seems to me that he should pay more attention to the needs of the animals suffering at SeaWorld than to the people who pay to stare at them.
And, if the new plan is being described as "informative," with "a conservation message, inspiring people to act," one has to question what's been happening at SeaWorld up until now! For ages, Born Free has argued that keeping orcas in captivity and forcing them to perform is neither educational nor beneficial for conservation. I suppose that the announcement of the new plan suggests that we've been right all along!