Editing Images with Upfront Editor

This is really an issue I have with The Upfront editor.

I have a really difficult time getting the images to size properly. For example I have added the featured image in a post as 827 x 600, 768 x 577, and even the full size image.
somehow the image always stretches and does not show the whole thing.

Also images in posts are extremely difficult to edit on the fly. I want to be able to resize the image to fit into my posts while in the editor.

Is this possible with Upfront?

This is something Thrive Themes does extremely well and I am used to it. I'm hoping there is a way to better edit images with WPMU Dev