By keeping the Gwazi name they don't have to re-name the courtyard area (which is called Gwazi Courtyard for all festivals and events). Plus, shops, kiddie rides, and even games are branded with Gwazi. Smart.
We were all calling it Gwazi replacement anyway, this makes it easy. Aaaand, since they're using some of the wood supports from Gwazi, I think it's sweet of them to keep the name.