[opk]

If you've only compared against zsh's out-of-the-box completion then you're comparing against the fully backward compatible with how things were in 1993 state. Turn on compinit, and a half-dozen styles to enable descriptions at the very least. The content of `StartupFiles/zshrc` from zsh sources is more than enough, no need for a bloated framework like oh-my-zsh.

[saagarjha]

Yeah I'm comparing bash-completion with compinit (at least I think so). I just didn't really like how it "picks" an option for you