I honestly think the vast majority of complainers have never played a MK game in the last 10 years ago or so (patches/fixes never existed)
Once any infinities, bugs and general functionality issues are ironed out then leave the character balance/design alone. It is what it is and NRS game designers are paid to do a job they see fit on what should be in the game or not.
However, fixing some character specific variations, such as lao's Tempest day 1 is fine, since the day release of MKX was a beta, yet in it's current form IMO, it doesn't need any major changes.
Make do with the tools we have and learn to adapt and adjust to different MU's, etc, instead of being butt hurt over Tanya lately lol, because if was not her, it be someone else, blah, blah.
The game is only 8 months old with loads to discover, due to the variation system it has.