- user names are a huge part of what makes Twitter interesting, imho it's not meant to be the type of service with real namesI am genuinely curious of the use cases where the username adds more value than the name associated with the account. I'd also like to know what type of service twitter is supposed to be in your view.
- replies do get grouped as complete conversations, and it's been that way for a while now.
Technically they do, but visually they are a mess. The way humans naturally converse is by adding their comments to a topic. This is why facebook lets you comment on a wall post. If you read a wall post and the comments, they make sense. On twitter, it begins with reading some random comment and then having to reverse engineer the conversation it possibly may belong to.
- lists really aren't that hard to use, I don't know what your problem with it is
On twitter.com, in order to see a list, I have to click on an icon on top, click on "Lists" and then click on a list name. That is 3 clicks and a page reload compared to facebook's 1 click. Furthermore, so I click on a list, browse and want to click on another list. I must hit the "back" key resulting in a page reload, and then choose another list.
it would drastically affect how the service works and feels
Sure it may feel drastically different...but that could be for the better, no? 140 char was a great thing to launch with just as facebook restricting to college campuses was a great hook - but products evolve to accommodate wider audiences. Twitter hasn't.
My personal reading is that twitter long passed the threshold where it would be some underground place and increasingly tries to present itself for the mainstream--without changing the product to accommodate the mainstream. The equivalent would be facebook opening up to the world but building features mainly for the college market.