There have been several major reforms of Russian, right? Maybe another one to clean up the grammar a bit?
The spelling is fine I think, once you understand the rules and how the "soft sign" works.
Well, we cannot change the grammar of the language. People will speak as they do. The use of cases with nouns will stay the same because we really speak in such a way. Planned Russian will only eliminate extra irregularities, exclude rare irregular forms or words. For example, more and more people say махает instead of машет.
Do you understand the spelling rules of Russian? Children spend 7 years at school for spelling, but people still make mistakes.
Rules about soft sign are not very complex.