I would be more than happy to see the return of MT but they need to address the eye problem issue first.
Inadequate housing was the reason for this; and I believe this can easily be fixed with proper shielding of sunlight (through tarps, ect.). Melbourne already implemented this for Semangka prior to her death, and after spending years off display, they noted she was finally comfortable with venturing outdoors and on display.
It might pay to have the tapir exhibit primarily indoors. The elephant barn was proposed as a solution, if that could be remodelled; or even something purpose built. If not, it shouldn’t be hard to literally shade the entire exhibit. Given the chance, Malayan tapir will happily bask in the sun and shielding 90% of it would just lead to them finding the 10% that isn’t. They don’t know what’s good for them.