One thing that is missing and is crucial for many I would think is.

Being able to combine accounts and not having to log out to check on one (Mainly for Delegation) So for instance an investor has an account with X amount of SP but does not want to use it to play and has another account that is mainly for playing. @moonsteem1 has mentioned this before by allow proxy accounts and combing resources or accounts within the dashboard. One account delegates another invests in the bankroll and another Liquid STEEM.