Your suggestions are really good but do you know that if messaging privately is allowed people will be disturbing others with higher Steem power for votes...thereby increasing spamming rate. I don't think that's a good idea.
Then for notifications @ginabot has a solution for that already. Just check out the blog and see for yourself.
Then for the new tab I really did not understand what you were trying to suggest maybe you can explain better.
Anyways thanks for this suggestions and keep steeming
Hi, thanks for the feedback and your honesty. In terms of the new tab, I meant that it would take you to content suggested for you. So, if you recently posted two travel articles, a suggestion would pop up in there suggesting similar content to travel. And yes, the messaging thing would be tricky but like I said, something should be done to avoid spam messages. Maybe if you get a notification saying: @imagendevoz would like to initiate a chat with @thankgodikkc
On a side note: Steemit has already introduced a Mute Feature which allows you to mute other Steemians. So that should allow for some peace of mind in terms of a possible future messaging system.