Show us the numbers.
You have the numbers. You used to compile matrices of winrates and pickrates in ranked duals and duals and in what skill ranges. People can bicker and bitch about what heros best and what moves are best. Having cold hard numbers will at least point the communities bitching about this and that in a more cohesive direction. Rather than dozens of voices complaining about their own biases and this move and that feat.
Eg: show the number of light parries in low rank duals and 4s compared to higher rank duals and brawls to finally shut up the incessant "light spam" complaints. Show who's feats land the most and do the most damage/kills in a game. Show how often heros land strong finishers Vs heros that are stronger in neutral and dodge attacks (spoilers the latter wins)
Post them in the subreddit and see how many voices rally around one point versus what people belly ache about in the comments
Thank you for listening to my Ted talk
...