Make keys wider on Russian layout
Keys are too narrow in portrait orientation on Russian layout which makes it very hard to type. You can easily fix this by removing Ъ character from first row and making it an additional character under Ь (same as Ё under Е).
Removing Ъ from first row will allow you to make keys on all rows because there's some unused horizontal space on second and third row. You can also make shift and backspace narrower to free some space for keys.
Sergey Apalkov commented
Check other keyboards! Nobody use these signs (mentioned above) which makes the widh of buttons in Russian the same as in English. Swiftkey in English is really-really good! In Russian below average JUST BECUSE of this BUG, which could be fixed easily!
Denis Yurkin commented
Please consider voting for a more popular request addressing the same problem: http://support.swiftkey.net/forums/140949-5-language-model-feedback/suggestions/2042073-wider-buttons-for-russian-four-rows-layout-or-lon