Again, not on board with this. I mentioned before why the scaling would then make no sense, and it still applies here.
On top of this, this isn't even in the same league as the Mundus tweet. In the other, a question was asked if Mundus really created multiple stars, and Kamiya replied that it was a universe. Whether this is deemed acceptable or not, it is far more concrete than directly asking him if Jubileus is a universe buster and his response being equivalent to an uncaring shrug.
If I asked Toby Fox if Chara could destroy an infinite dimensional construct, and his response was "Maybe. Maybe not", that would not be deemed nearly enough to upgrade the character due to having no showings to support it, coupled with the overly direct nature of the question, and the author's own uncertainty/apathy.