Sif

First off, really? Your objection is the flavor text? Okay then, that seems really silly to me, but let's roll with that. Blend in, let's roll with that. Batman's stealth comes from "blending in" to the environment (via hiding in the shadows)... I don't recall him depending on becoming transparent to 'blend into his environment'. Or, another: camo. Camo is used all the time in the real world to 'blend into your environment', but that doesn't involve becoming transparent and ghostly (systems depending on mirrors and projection are still pretty bad and experimental). "Invisibility" from Concealment explicitly says bending light around you, but, again, it's just flavor text.

Could you elaborate on what way you think it's silly? From an in-universe perspective, there's many canons where people have used stealth/invisibility by manipulating the minds of others (Doctor Who - the TARDIS does this to a limited extent, X-Men - psychic powers many times, Ghost in the Shell - hacking someone's eyes, all spring to mind), without actually obscuring themselves physically at all. From an in-universe perspective, this would remove friction for more concepts. Seems to perfectly explain stealth/invisibility to me while not making your costume translucent (if not, seems like you should object to your costume being at all visible when "invisible"). From an out-of-universe perspective, PvP isn't impacted (minimal fx in pvp was dealt with long ago). There's the "situations" SwitchFade above alluded to, but, I'm struggling to think of any instances. A team deciding to stealth a mission? Can leverage combat attributes for yourself, and someone using grant invis wouldn't be impacted when figuring out to reapply it. IIRC, Stealth / Stealth IO don't modify your translucency when suppressed, so you can't visually depend on them anyways to know when it's actually making you stealthy.