Just throwing this out there.
If the GIJA reform were to go through, then making new connectives would be shockingly simple, as we wouldn't need to make ~6 varieties of the same connective. That being said, it would be perfectly possible with GIJA in place to make a new connective to be understood as separating a list of alternatives from which the speaker is to choose only one. Sadly, the disadvantage is that this connective based system is poorly extensible; how would we use it say "select 2" or 5 or 12 of the options. Subscripting is a solution, I suppose.
.i mi'e la tsani mu'o