a "witnesses" tab next to the "Votes" one where you can see the witnesses the user is voting for

I'll add this to my TODO list

addition of bandwidth to the voting power counter

I don't find this as much important as the voting power. Why would you want to know the bandwidth of another user? Maybe yours could be important, but If I put too many info on the account info header of the page that would become too crowd..

native extension in the Chrome Web Store, Opera Extensions Store, etc would probably help get it more noticed, make it easier to install, and help with auto-update

You are right, that could be easier for the user. But at the same time I find that a lot of people are happier this way, because if auto-update is implemented I could (if I'm evil) wake up one morning, find out that 1 million user are using my extension (yes, in my dreams), and release an update where I steal all your money.
I'll have to find a way to do it though... I'll think about it and also see if others are thinking that this is a must too 😉

Followers section can show the time the person followed you

Yes, that I'd love to do that! And also order them based on the time. However for what I saw in the API there is no way to know when a user became your follower. The only way to know that is by scanning all the blocks in the blockchain and see when a user started following.
That means I will need to develop a tool that check 24/7 the blockchain for changes... It could be a nice challenge! I'll try one day!

If possible, when you go to wallet, it can auto-click the "Claim your rewards" button if that's there :)

Well, I'm new to steem, so for now I don't see it much annoying 😹 Maybe I'll add this in the future if I see that I start to be bothered by it or if other users point this out