web client sucks
I remember having sort of high hopes when word first came out that a web client was coming, but it's just been crap. As a linux user for 18 years I'd rather use windows and the .NET client (normally interface with vCenter through Citrix XenApp + .NET client on windows because the vmware client on Linux Xenapp client doesn't work very well).
I know that the latest VM hardware version 12 requires the web client so for the 4 VMs (windows 2012) that need this hardware version I'm forced to use the web client when making configuration changes. It's painful. It sucks (I've only tried it on windows). I have a pair of ESXi 5.5 hosts (about to add a few more) the rest of the servers are ESX 4.1U3 (good 'ol thick ESX I like that much more than ESXi).
Fortunately even today I hardly ever have to touch the web client. Maybe by the time I have to regularly interact with it they will have it fixed, yeah probably not.
I read somewhere recently that vmware was (or perhaps has) turned the web client into an .exe instead of a browser plugin based interface.