TL;DR: There are some pretty deep-seated wounds in the community that this harped on perfectly, therefor leading to the strong backlash you received. Don't take this personally and don't stop posting, you should continue to contribute and work at this. Generally this is a very good community and friendly if you don't happen to poke the wounds already there.
I normally try to be positive and encourage most people in their posts. There has been a long running theme of 'buff my char' or 'fix strings that say mid and whiff' or 'this is so OP, must be nerfed wtf are NRS thinking?'
This thread happened to hit a weird mix of being right on cognitive science (reaction time, difference in reaction time measurements, etc.) so I had fun researching this, happened to be a little drunk, and also just the figurative straw that broke the camel's back for my tolerance of those kinds of posts.
I know Sonya suffers something that is literally identical to this: her primary string: b14 (the overhead to low) has the exact same spacing issues where it is interruptible when close, but safe at long range. A lot of other characters suffer from this, mis-labelled mids vs highs, or just strings that have armor-able (or even parry-able!) gaps in their strings.
I would highly encourage you to not get overly discouraged from posting and keep attempting to contribute, but just keep in mind immediate or accussations that people don't understand how to do their job that they have spent years of their life doing (and often even more outside of their job; most people in the video game industry play video games for fun as well).
It's a notably sore subject for most people that frequent this forum that so many people say 'game engine is borken' or 'my character isn't as good as I want it to be, therefor I request XYZ and buffs.'
It's something that's remarkably rampant in this game, and one of the main criticisms that I've heard lobbied against NRS communities from other FGC's ("Why don't you just play the game instead of crying about characers") and also part of the reason why so much name calling goes on: if you aren't top 8 in a major, don't talk about balance, OR online players don't even play the same game, OR everyone cries w/o learning a character, etc.
NRS games get reasonably frequently patched relative to other games, so players have less time to adjust to specific things and they tend to jump to conclucsions even faster than most; often before they've had the chance to fully explore options.
I like that you added the criticism based on character identity and how you think kenjutsu should be played; however balance is NOT about making everything homogenous. You don't want every character to be good at everything and have no weaknesses. That would be an idiotic game and would get boring fast. That's why I'm of the opinion that when Quan Chi gets knocked down in the corner, he absolutely gets bent over and SHOULD lose. His offense is a train that doesn't get stopped until the other player makes a few good guesses. Kenshi is one of the strongest zoning characters in the game and that is and has been his core identity since mk9; kenjutsu might be a flavor variation, but the best zoning character shouldn't be one of the best rushdown/melee characters as well from an identity or game design perspective; it leads to super flat and boring top 8's (ever notice how many foxes there are in super smash melee tournies?)
Ultimately game balance is something a lot of different people have very strong opinions on because the game is a big part of their free time, but it is not something most people have had extensive time practicing. Bug reports and forums like this are a fantastic place for people to be able to interact with the game designers and talk about this with them, however if everyone is crying wolf (bug reports that aren't bugs, cries for balance of components of the game engine, etc.) then the developers will become much more callous to the audience in general and will either stop listening to that community or just take them less seriously which hurts the entire community. THAT is why you see such a big backlash from so many different people about something like this.