Yeah to each his own but when you're dealing with a basically broken web player versus VLC which works all the time, it's an easy choice. I can't tell you how sick I was of restarting the web player countless times when I was out of town couple of weeks ago. VLC can play at multiple speeds and scrub, and of course you have PIP because you can resize it.
There's not much reason to not use VLC considering the broken state of the web player. I wish I could use it because it's easier but at this point it's not worth it.