Nothing is exactly set in stone (no pun intended), but my current idea essentially involves updating the letter forms to be better suited for writing on paper, and I was also thinking of using a dot diacritic for voicing and umlaut, and having the staves be x-height normally but extend downward for doubled consonants.

Ideas that are more sort of "on the table" are whether to use monographs for ⟨sj⟩ and ⟨kj⟩ etc, and monographs for the diphthongs; whether to have an optional diacritic form of ⟨r⟩ to represent the assimilation of /r/ in Eastern Norwegian; whether to use the same letters for certain sounds in complementary distribution; whether to extend the usage of the dot diacritic to alternate between otherwise similar sounds, rather than only voice and umlaut; and whether the runes should indeed have staves at all.

The problem is that depending on how many of these ideas are implemented, and the ways in which they are implemented, you eventually end up basically abandoning the idea of "modern runes" in favor of basically reinventing Shavian script but for Scandinavian. So it's difficult to strike that sort of middle ground between ancient and modern, especially when trying to balance that with practicality of use and ease of learning. Another matter is of course which forms of runes to actually base the script on: if we stick to just Scandinavia, we have Elder Futhark, Younger Futhark, medieval runes, staveless runes, and Dalecarlian runes, and these often have very different letter forms from each other.