Yeah not many things changed and definitely nothing major.
I think Twitter lacks innovations which is a big problem for them. In my opinion they should do a lot of cleaning of their database as there are a large % of bots. We did this on Gold.Forum removing over 30% of bots, inactive members and spammers and we will continue to do so. This way we can know exactly how active the community is. Also the advertisers have accurate date.
What I will do to make Twitter better is:
1) Get rid of bots, spammers and inactive followers.
2) Will improve the advertising spots and advertising tools. I've head from a couple of advertisers that Twitter is expensive and targeting is not that great.
3) Will catch up with VIDEO. Video is important so I will encourage users to interact with videos.