If you want to really give a writing system that would help make tp better, I think the right move is to consider writing system that are non-linear, but rather two (at least, but I don't want to get too far ahead) dimensional. tp has only one deictic pronoun, 'ni,' and one anaphoric pronoun, 'ona.' If you have occasion (as I did just the other day) to want to point to two things verbally (typically sentences in tp) or want to refer back to two things, what do you do to make matters clear. Well, rewrite is one possibility, but one that often results in sentences that seem forced. As the saying goes, repetition is also anaphora; that is, rather than using 'ona,' you repeat the original expression, perhaps in a simplified form. But that is often awkward -- and not guaranteed to make the referent any clearer. Then there is tagging, dividing 'ni' into 'ni poka' and 'ni weka.' 'ona' into 'ona mije' and 'ona meli,' for example. The examples, though recreating familiar patterns from English in tp, are not going always to help, in just the way that "this/that" and "he/she" fail in English. So we could try adding 'nanpa wan' and 'nanpa tu" on (or some similar device -- though I can't think of another), with some rule about which is the first and which the second from the source for 'ona' and probably a 'la' clause added for linguistic 'ni.' But suppose we could use the second dimension to indicate what matches up with what: a line from anaphoric pronoun to referent, similarly lines from different modifiers to the modificand, maybe setting them vertically parallel to show they each apply equally.
At first this looks like nothing more than a minor elaboration of sentence diagramming. But, of course, it could be extended beyond sentences to paragraphs and whole discourses. More importantly (?), since this scheme is built on the assumption language spoken face to face conveys more than the written record, we could include indications of many of the clues that the direct situation uses: pitch, stress and juncture, posture, facial expressions and hand (etc.) motions, the whole of Labanotation and Stokoe on ASL. Any suggestions how to go about it (and that includes how to get a computer to cooperate)?