Very interesting post cause i have numerous times mentioned the interface issue and how big it is. I haven't use any of these interfaces primarily cause i am used to that one but i know a thing or two about the others. First of all, busy is the first interface so it had more time than the other 2 to grow bigger. The main reason most people using it isn't how good the interface is but because of the community and votes they get. I have to mentioned though that i keeps a % of your post payout if you write through the app something that i don't like.

Steempeak on the other hand is quite new so it has room to grow. It seems cool but needs a stronger community. Also, as far as i know if you write through it you don't pay something, which is +++ for me!

About steeve i don't have an opinion yet

Overall i think that a new interface is needed and i believe that destiny will play this part. Although all of the above (except steemit) have a community and are better than the original the people that will search for steem will see steemit as their first option. So either we need to change steemit interface and by that i mean steemit inc or by making an app so huge that google will show that one in advance!