Different questions and proposals for steemit

So, I used it for three weeks, maybe a month
Accumulated a few suggestions, maybe it just questions :)

1. Whats about mobile App? For iOS and Android? With smartphone site works quite well, but still tested some disadvantages.
2. I think the site is not enough personal messages. Sometimes there is a desire to clarify something from the author or offer him, which should not be made public. Of course, I do not know how it will be recorded in blockchain, but I think it would be cool :)
3. Should we limit the moneybags in effect on the payment? Sometimes I've seen posts where moneybags upvote himself and his payment was about $ 50 :)
   It may be limited to 20 upvotes per day. Or do not give the opportunity to vote for themselves. Or reduce the upvote value for each vote.
4. There would also be useful customize news feeds. With a subscription to account and/or to category/tag.
5. What about regional / language sections? For many Russian-speaking people have seen here
   Let`s do Steem international!
   Что насчет региональных/языковых разделов? Уже много видел русскоязычных людей здесь
   Сделаем стим интернациональным!
6. It would be nice to be notified about the response to your message or your topic