The game manual doesn't really explicitly state it (presumably because they never actually implemented a div VI in any country), but the way it talks about promotion out of div VI, the "original" implementation was always a skyscraper, just with the pyramid extending to div V instead of only div IV. And reading between the lines of the finals bonuses and promotion bonuses into div V or lower, my inference is that the economic situations in the "original" skyscraper were intended to be such that div V and lower would all have fairly similar economics.
(https://buzzerbeater.com/community/rules.aspx?nav=Standing...)Plus, before the S71 changes, Utopia had capacity for 1,872 teams; after the changes the capacity is now 2,384 (27% growth). Adding a div VI would further increase that capacity to 3,408 teams - almost double the pre-S71 capacity of Utopia, and probably well beyond any realistic ability to fill Utopia without the mythical UI update and major gameplay changes leading to a large increase in player base. So I think it's pretty safe to file "what about a new team starting in Utopia VIII" under the category of "a great problem for future us to have to think about".