I’m for whatever people actually want to speak.
In the eastern third of The Ukraine, that was Russian, and suppressing the Russian language after the U.S. sponsored Maidan Coup (not taught in schools, not used in any govt buildings/official proceedings) is a big part of the reason for the current war. It formalized that Russians were 2nd-class citizens in Ukraine, from east to west and north to south.
If you have to make up a new alphabet out of whole cloth, instead of phoneticizing one of the in-use alphabets, betrays the “divide and conquer” strategy.
Good grief, the English conquered Ireland and supplanted Irish with English, but Irish is so hard to learn, even the Irish stick with English. And Roman letters.
There can be one official state language, or more. And that is no contradiction to people speaking whatever language they’re most comfortable with among themselves. In Europe, Latin was once the official language everywhere. And every region had its own lingua franca, which was whatever it was.