Maybe it's unfair but I always associate da feelz with the are games art kind of arguments (mostly useless) or what have you arguments where it always boils down to "Yeah but did it make you cry?" and that kind of thinking has always seemed to me like people are underselling their own point. Like Journey or Telltale's The Walking Dead, which I'm pretty sure was the genesis of the feels, when people praise those games eventually someone will say "It's a game that made me cry!" It's the same with Clannad or whatever other KEY garbage there is. If making someone cry is the best achievement you can raise for your medium then you aren't doing that good of a job. That's of course not to say that it can't be effective in games like Nier or Metal Gear Solid 3 but I'd say those games have actual pathos, or anime like Jin-Roh or Gintama. Yeah, I named those 'cuz I did cry at some point during them but I wouldn't name that as a selling point.
/nonsensicalrant