*insert obligatory 'U DNT PAY MY SUB!!1' response here*
But honestly I feel like I take the rare tidbits of valuable criticism I get ingame pretty seriously considering how rare they are. I'm not amazing but I'm also not god awful so I tend to pass under this radar more often than not, especially on healer.
I've learned so much more from people on the forums/discord than I ever have in-game it doesn't even compare.
I have seen some people throw out what they might believe to be helpful advice in-game but it's usually actually rather poor. I Cure III'd stack markers in Shinryu normal once and had my cohealer tell me to use Medica instead... Silly stuff like that makes me wonder how seriously I should really be taking those things.