As to the containers I find the right click to close in the top right portion of whatever container is open to close it is fine, but I'd like it to apply to the entire area if possible, like right clicking anywhere on the container to close it, save a bit of time rather than rushing to the x button or simply running away to close things.
As to loading times it varies from system to system. I'm running on a mid range pc without a decent hard drive (ssd) and I've yet to see more than a flash of a loading screen, like less than 2 seconds. So I'd rate it's just luck at this point which is normal for alpha testers, try reading through player feedback to see if people with similar specs to yours are encountering issues to try and nail down why it's happening, for example a lot of people have trouble on 32 bit systems at the moment.
Pacing objects into others as you put it seems one of the standard features one would expect from divinity, but the system can be a little sensitive to ti at the moment causing it to happen accidentally, along with the stacking.
As to the turn based versus real time that you think people would like, as I can see it at the moment most extreme long time backers of Larian are enjoying the turn based system immensely, and has been stated previously by Swen he wanted the other games to be turn based when they were being developed but the idea was squashed by publishers, give them time to polish the combat system they've been craving and I'm certain you'll change your mind if only in this one instance.
