I never use theater view because I use MC exclusively on my desktop/laptop, but I do pop into it once in a while to check out the new features. It is therefore not important to me that these issues be addressed but I thought I would report them anyway.
1) Crash. For many months and many revisions of MC I get a consistent crash every time I select the Video view scheme in Theater View. The same Video view scheme works perfectly in Standard View so I am not sure what additional information to provide to help you diagnose the problem. The view is modestly complex with 7 panes, 1 of which is a Search List and the other 6 are simple Library Fields. The reported error is "Microsoft Visual C++ Runtime Library, Runtime Error! "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information".
2) Bug? My Image view scheme excludes one genre via the syntax "-[Genre]=[other]". It works as expected in Standard View however in Theater View the excluded genre is displayed. This problem may be unique to the Image view scheme because, as a test, I excluded a genre from the Audio view scheme and it worked as expected in Theater View.
3) Suggestion. I have a view scheme which I call Main and which is located in the root (i.e. created from within Playing Now). Main is pretty much the only view scheme I use because it includes all media types and I have made extensive use of the pane Search List feature to give me every filter into my media library that I need. Although Main's properties have been set to Show in Theater View it is not available in Theater View. It appears that Theater View only supports the stock Audio/Image/Video views. I think this is a major limitation. Almost all of my "albums" have multiple media types. For example, music albums have txt info and cover art jpgs. As do my audio books. As do my video lectures. As do my jpg maps. For me, the only view scheme that makes sense is one that includes all media types. So I personally think that the stock Audio/Images/Video views are an old fashioned and overly restrictive way to categorize media and should be replaced with a single root view scheme that includes all media types. I expect this suggestion will not have much support, but fortunately there is a reasonable work around because we can create a custom root view scheme as I have done. But unfortunately this custom view scheme does not work in Theater View and I think this should be addressed.
One more thought: There might be a clean and easy way to address my concern about the restrictiveness of Audio/Images/Video and keep everyone happy. It is already possible to override the Media Type qualifier in these views. The problem is that it is not possible to rename these views which makes them non-intuitive if the Media Type is overridden. If you were to make it possible to rename the stock Audio/Images/Video views then every conceivable need would be met.
Cheers, Rob