I think you have got it the wrong way round. The hardcore crowd actually love the core gameplay but when they think thier character is buffed/nerfed that's when it becomes cloudy, subjective and at times biased. That's why I don't like tier lists because it encourages players to use that as a scapegoat.
I don't have it backwards. Balance can be checked through tournament results. It's obvious that it is fairly balanced.
People are complaining about SFV being boring to play and watch. This is where you're confused. The recent complaints about season 2 balance has more to do with Capcom taking away options away from the characters, therefore making them more boring. For example, Nash can no longer play like how Infil played him last season. Nemo switched to Urien, not because Urien is top tier, but because everything he found fun about claw in season 1 was taken away. This was Daigo's initial thought about season 2 as well. The reason why he wanted more buffs to the lower tier characters is because he wanted those characters to be as fun to play as someone like Guile or Urien. Fang was ass in season 1 and in season 2. People are complaining that they didn't make him better, but the overall tier list is largely still good. Characters were just shifted. You also have Art who has been defending SFV the whole time until recently. He wanted the game to be more neutral based, but it didn't turn out that way. So his complaints about the balance changes are more to do with the style of gameplay it's promoting.
Sure there are complaints about balance, but the main take away from this recent topic is that characters in SFV need to stop feeling neutered. That is what prompted Core-A's recent balance video. Objectively the balance is great and the tournament results will likely keep showing this in season 2.
Here is the recent talk on Ultrachentv as well.
https://www.youtube.com/watch?v=iz29_rnjEb4
In the end, I will continue to support SFV because I just like the community and the series too much, but it's not like I'm happy with the way the game is. It's disappointing that the game will always be a case of "what if."