opera mini beta uses more ram than before, and it is on extreme setting not high(Turbo) .

please add option to switch save pages view from grid to list, like the bookmarks page in next beta.

I know opera Max doesn't compress low quality images, but what counts as low quality. I am using apps which Max doesn't compress most of it's images. the app processes many images as it is a gallery app but the images aren't compressed. it also doesn't use any form of encryption and the server is easily accessible from a browser.can't Max compress all images except icons and images with low pixels.
the application downloads the images and then views them.

Turbo compression rate is quite low. I am on 88% on mini and 12% on Turbo.

Turbo has some drawbacks, since it uses server based compression. also opera browser has a fully functional rendering engine, ie chromium, and thus has full support for web based apps and features. I think Turbo was added due to many requests for support for advance JavaScript and HTML 5 support. anyway ios opera mini has Turbo, mini and uncompressed mode, so why shouldn't android get them.

Turbo mode has native video playback support. just streamed a video from YouTube, and it was so fast.

  swipe down to refresh doesn't work in Turbo. also fonts size increases when in Turbo. 
    

Refresh swipe works just fine.

... on Feeds page.

Well the feeds page does not seem to be different from mini mode. As feeds don't even work on opera browser, it may be using mini mode for that.

Opera only support windows mobile series of the windows ce family, and that one is at v5.

does opera mini beta have a rendering engine for Turbo mode.

Your native browser does, in my case Chrome 30. With Nexus devices you may have a cutting-edge browser.

I was wondering, the old mini, uses already rendered pages from the server and just views them, but now with Turbo, the rendering should be done on phone, in the browser. Other browsers, including opera mobile, use a lot of ram on my device, so if Turbo on mini get improved, it will be my main browser

swipe down to refresh doesn't work in Turbo. also fonts size increases when in Turbo.