I for one am glad to see another zoo go out of common hippos. It's one of the most costly species to keep, and once LSS systems are factored in are also take up more space than any others (except maybe elephants). Especially once we factor in that most zoos don't even keep hippos in natural social groupings or exhibits with large terrestrial areas, it definitely seems for the better that hippos are becoming slightly rarer in zoos. It lets the zoos focus on other, more endangered species.
You might be surprised to find that I agree with you entirely here. As great as it has been to see Common Hippos at Woodland Park Zoo over the years, the exhibit really is an outdated one and not at all adequate for the species in the modern age. The indoor area is small and the outdoor pool is not heated at all and so the hippos have had to put up with cold water for far too long. It's an old-fashioned setup where twice a week the keepers drain the water and hose everything down, instead of having a modern filtration system. To top things off, that part of the zoo gets really congested along the visitor pathway and the viewing areas for the hippos are awkward. Sending 'Lupe' away gives the zoo an opportunity to redo that entire zone if they fundraise for it. Fill in the pool, widen the pathways, net the whole thing and make it into an exhibit for Spotted Hyena, Leopard, or a type of primate.