1) Most issues don't fall on a binary - and are not conducive to the pro/con, positive/negative, yes/no binary.
2) Most individual positions are not reached at one end of the spectrum. They start of near center gradually oscillate and deviate the more someone studies a subject. As such, a UX that places pros/cons front and center robs the reader of the actual learning/oscillating phase. I ask that you to find the source of any opinion you hold and try to reach back to it's source. You'll rarely find that it was a table that you studied and picked a side on.
4) Discussions should not center around individual issues. Rather it should be communities around a certain topic, where the discussions evolve and debates arise. The OP only does the latter -- which perhaps makes sense if say some communities like sub-reddits use it.
3) Expertise is not up for debate. An expert's opinion should not be moderated, or weighed, in the same way as a layman's opinion. you can argue for pure meritocracy, but an expert will simply not indulge in an environment when they have to prove their expertise day-in-and-day-out. The platform needs to acknowledge the parallels with how debates and opinions are shaped AFK.
(note above is purely for matters-of-opinions, not for matters-of-fact.)
Overall, what you don't need (and what's been done many times) is a table with all positions listed down. What you instead need is to solve for the larger problem, or handling moderation, reputation and expertise, because consensus and debates actually do care about the above. This does not mean anonymous/pseudonymous discussion is not possible, just that the framework has to allow for it in an integrated manner.
I have tried multiple implementations of above (not public-ally available), but none satisfactorily handled the above -- it is a hard problem to solve, so I commend and wish all the best to the Kialo team.