As a speaker of Polish (western Slavic) reasonably familiar with Ukrainian I find InterSlavic and madzuslovanski (or whatever it's spelled) much better than this Slavio.
Ukrainian is a Slavic language. It's average of language spoken by 9 tribes with light influence of ancient Greek from Crimea and Byzantine, with almost no German and Latin influence, because they are proxied by Slavic neighborhoods.
Greeks influenced Ukrainian language indirectly: via songs. When Ukrainian salt traders (chumaks, чумаки) visited Crimea, they also picked fresh songs to sing when traveling, and then they spread those new song all over Ukraine. Often, chumaks based their songs on Greek songs, because ancient Greeks were much better in music. Chumaks also created portable copy of harp, which they called «bandura» («big thing»), which then used for hundreds of years.
As a speaker of Polish (western Slavic) reasonably familiar with Ukrainian I find InterSlavic and madzuslovanski (or whatever it's spelled) much better than this Slavio.