I do not have good experience with the eSteem App lately, especially the last update was terrible for my experience.
but you made some good points, the slider for example! But who wants to slide a 0.01$ vote? :-D with voting power below 50¿!? :-D
Anyways if you author a post in eSteem App they will take 5% of your rewards if I remember correctly.
And the app is not very stable, but I used it for a long time when I just arrived at steemit.. Now I'm using the mobile browser version..