Though I do think some kind of more in depth password manager would be extremely handy the use of a 2-step system can be a double edged sword; allow me to explain.
There have been a slew of hacks going around the Twitter and Youtube scene lately and the way the majority of these have been done were in fact WITH the 2FA system, it has been circumvented with a bit of social ingenuity and basic technical knowhow.
All it would take is a would-be hacker to have some of your basic info and they could call your cell provider up posing as you and have your sim card shipped right to their location, slip that into their own phone and bam! They have your account.
Now, this is not an issue for most people as getting some of these details aren't as easy as it may seem but some "hackers" and social engineers are VERY clever and know their way around the system they're trying to thwart. I personally do not use the 2-step system for this reason but instead just manage my own passwords myself. I'm not trying to scare anybody who uses this sytem as it is a very good and convenient way to keep your passwords and logins secure but there is a huge, glaring loophole and some people do know how to worm their way through it.
All great points. Thanks for the response!