The grass will grow in summer but some simple improvements would be;
1. Upright thick tree trunk as scratching post.
2. Couple of large horizontal tree trunks.
3 Small pile of rock slabs as alternative surface to lie on.
4. Clumps of bamboo to break up starkness.
But from the post below, if its that new they may intend to add some of these in due course anyway.
Crikey give the place chance 7 months ago this was just part of a grass paddock!In that time they have built the house,which will also house the Malayan tigers that are due this year,built this enclosure and the platforms,and all with posts that don't rock when you lean on them un-like another place,that built Big cat enclosures in the same time frame as this!