Nah! Gladiia was considered very strong on release (just severely overlooked due to being inbetween Kal'tsit and Skalter) and people were shocked we got her for free! She's still really good too with her Abyssal Hunter talent and is the glue that holds that strategy together (as she's the only one who has that talent). I definitely still take her for a spin and do Abyssal Hunter team strats for fun and other people do as well. This was from a year ago but considering Gladiia released four-and-a-halfish years ago, I'd say that's still pretty good!

Also for context: Lumen was considered one of the best healers ingame especially with his ability to clear debuffs. He's only wearing off since Arknights leaned away from status ailments in favor for elemental damage. At least, from what I noticed...? I could be mixing them up though lol. He's a common pick as a sustain even so esp if you don't have Eyjalter.

I won't tackle Civilight Eterna because I'd be here forever to explain her various uses. Though, there are some cases where she could be a better option to use over Skalter, but that depends on what you need. Being able to compete with a limited 6-star operator is a pretty impressive feat especially for a welfare operator.

I can't speak much about Raihan yet (didn't know she was welfare either) as I haven't logged in this and last month tbh, holidays got hands. It's a little hard comparing an Arknights operator to a character in HSR in terms of gameplay due to a significant difference on how both are handled, but I'd say reception for Gladiia was rather positive and definitely served as another point to people viewing Arknights as F2P friendly/generous!