Based on my experience producing right-to-left content and fixing related software bugs, I'd say they are mostly unaware of the complexities involved.
Any software they use today should be adapted to work with the traditional script. How are they going to mix their new script with Latin-based or Cyrillic scripts? What about adding math to the mix? I hope they invest in solving these issues, it would be very interesting to see the outcome.
They are fully aware of the complexities because six million people in Inner Mongolia in China already use this script.
The current situation is this: "As of 2015 there are no fonts that successfully display all of Mongolian correctly when written in Unicode" [1], meaning that specialized software using Private Use Areas of Unicode are the only way to typeset it.
From the date, in Arabic numerals, on the president of Mongolia's website, it looks like they solve that by simply rotating lengths of none Mongolian-content 90° to fit.
If you're learning to read Latin (etc) script for the first time, it doesn't much matter what it's orientation is - they're just symbols.
If you're learning letters then orientation matters unless you have extremely strict orthography. E M W 3 can all be written the same but have different orientations, for example.
My comment was about orthography, how letters are manually written; the context was learners who don't already know an alphabet.
It's not uncommon to write capital-E with cursive strokes so it's a reflected or rotated 3, and lower case m and w are sometimes written similarly - so as to be very close to rotated versions of the same character.
Yes, and OP's comment was in relation to higher level computer representation of combined forms, so as interesting as your comment is, at this point it's simply picking threads for the sake of self-amusement.
Any software they use today should be adapted to work with the traditional script. How are they going to mix their new script with Latin-based or Cyrillic scripts? What about adding math to the mix? I hope they invest in solving these issues, it would be very interesting to see the outcome.