I haven't been playing much lately but is there a reason Lin You is suddenly persona non grata in High Mercury? I know there are other more popular options like Victor and Kristy but I don't have them and it sucks to join a lobby only to have the others start spamming "Sorry!" when it was never a problem before.
Well... she's been out of eHMC meta from the start, so I'm not sure what'd make attitudes change to be
less favorable, hmm; I'm mostly surprised this hasn't been a problem for you till now? Unless you're talking about Standard and it's rippling down to there now?
She's not
bad but she doesn't provide the healing/support that the Wellys give, which is needed to get dps to >70% HP to make their prints activate, but she also doesn't do more damage than Welly to make up for the increased time that healing will take. And Victor not only does the most damage but also provides blade's co-ability; Kirsty is... also kinda a questionable choice, but if played ideally she can reach Victor's level (...even if I feel that's unrealistic). So Lin You is an outright worse choice (at comparable gear + skill in playing), unfortunately. Though I probably wouldn't outright reject one unless they had really bad equipment/stats, but that applies to more than just her.
Im getting real tired of noone wanting to play the healer role in most High Dragon trials, besides HMS. Ive been trying to do High Mercury and High Jupiter, and its rare that I get a group with an actual healer class character. Im considering trying Akasha, but I hear shes only really good for Mercurial Gauntlet.
If you're talking about eHMC, healers just aren't really ever used. There's no point when Welly can heal and Noelle can take the ranged baiting role.
For HJP, I'd say to just give it some time, though I've seen a decent amount of Heinwalds as is. If KY requires a healer as expected, that'll get more people to build a staff and so should increase (to some degree) the number of people running healers in HJP even if it's not the same unit as they use elsewhere. Not to mention how new Chimeratech weapons are, and likely gaining Spiral Cleo, etc.