It'll be interesting to see for how long you're able to keep up the charade, playing as her.

Dead gods are certainly part of the narrative, but as soon as you get into that kind of conversation most people will just check-out, I mean the players. It as to be spooned in or a clean break when it comes to sticky continuity, still I like the idea but as soon as SH brings it up it immediately becomes suspect, whereas if you have people treat it as a non-issue, it becomes more believable that either, Shar's iconography isn't easily recognizable, or it's generic enough to be a shibboleth.

Personally I just considered it one of these, with Shadowheart's commandos going in without any thought to being incognito.