First I will suggest the regulation on the use of voting bots.....it encourages laziness. If possible there should be a panel that will evaluate the quality of content one wants to use voting bots to promote, if it actually worth promoting, then approval is given.
The use of voting bot encourages people to post articles that have no quality content in them, and at the end they make huge return from it while a quality content written by someone else who does not use voting bot is not appreciated. I am not saying it should be banned, but let it be under restriction to only articles or post that are worthy of its use.

Will also suggest the reduction in the data usage by steemit platform, let them work on it and see that it's data consumption is reduced. When the data consumption rate is reduced, it will encourage people to remain active on line, my friends I introduced to steemit keep telling me that their data subscription does not last longer anymore especially when they visit steemit. This has made some of them to quit from the platform due to financial difficulty in buying enough data that will sustain them on steemit.
Thirdly, more tutorials for newbies will be encouraged, especially videos on how to succed on steemit.
These are my few personal suggestions.