It's a bit of a pity the coatis are not around anymore - iirc, Marwell had one of the best groups of the species in the country; most zoos only keep a small number of individuals..
though seeing recent law in the UK that made breeding of coati illegal, it is probably that Marwell's group would have died off later on.
I do also hope that the older Tropical World won't be abandoned -
The building is indeed very outdated compared to the more recent incarnation - though I do hope that the building may be used for something in future...