Maybe I'm reading it wrong but you seem to be suggesting ideograms as some sort of international written language (as opposed to proto-writing) facilitating ful

Maybe I'm reading it wrong but you seem to be suggesting ideograms as some sort of international written language (as opposed to proto-writing) facilitating full literary communication. I'm not aware of any successful attempt in this area. Whatever you manage to communicate with proto-writing will be extremely limited, lacking any sort of sentence structure, grammatical elements (subject vs object etc.), tenses etc., hence it will need to be complemented with regular text, and at that point you might as well just spell out your thoughts in writing. There's a reason why we use what basically amounts to proto-writing only to communicate extremely simple thoughts (warning signs, road signage etc.).