VM with hardware version 8 is going to be fully manageable using vSphere (fat) client.
vSphere web client is going to be needed for hardware version 10 or higher along with it's new/enhanced features.
not too sure if this is going to change in web based Host client which is a fling at the moment. see bellow.
ESXi Embedded Host Client
Narendra Padmani
VCIX6-DCV | VCIX7-CMA | VCI | TOGAF 9 Certified