Mirrors are a different thing from other effects. I just have to find the shader and apply the same fix as in RE2.
Expected. In the demo I found a lot of 2D shaders that just needed stereoization in the SV_POSITION output. I'll try to make a regex for this.
Also expected, maybe. New lens flare shader then.
Since last night I finally have the game (and Resistance). However, DJ-RK and I are fixing FFXV at the moment. It's nearly done (practically everything is fixed right now, and a lot better than the WIP fix). I may need two or three more days of focusing on FFXV before I start working on RE3... unless my curiosity grows bigger and I try to handle both games at the same time (50% chance).