For #9, I downloaded an app called Picture Editor that ties in with the menu in the Gallery. When you take a picture, you can tap it at the bottom corner of the screen, go into the menu and select Edit. The editor takes the place of the default stock editor included by Samsung.

For #10, I have noticed the opposite on my phone. It does depend on where I am, but my WiFi connections work great. I don't use the stock browser, but I get disconnects and page cannot be displayed more often on 4G than I do on WiFi. I like the xScope Pro browser (there is also a free version) for browsing. You get tabs, can have it "request the desktop site" version and a number of other nice features.

Just my 2 cents worth.