One way I already showed in Touhou Cafe thread (but it might not work here).
About another way, well, the funny thing is that I am sure that many of you already know how to approach ZUN (and how other people approached him). Which thing ZUN loves very much (other than Touhou)? I think you got it. Can average fans approach him like this? Rarely, but yes. I think I gave enough details. I even gave a hint from which point it is a good idea to approach ZUN about this topic.
Goodness, can you stop being coy and say your point loud and clear? Nobody wants to comb through an off-topic wall of text. If you mean approaching him personally then yeah, that's both unfeasible and inappropriate. A single person trying to present this point of view would definitely be viewed pretty weird. So no, that's not a viable alternative.
Plus again, I'm not sure how many people really care about the matter that much. Individually they tend to get mobbed by more devout Touhou fans, from what I see in other places. The way I suggested can show that in a consolidated and quantifiable way compared to how many people are okay to go with the flow. And if someone takes offense over the intended way to give feedback being used then, well, welcome to the real world.