Any advice on this upper jaw, before I start with the lower jaw

Sidney Eliot

https://imgur.com/a/GW3s32I (video for different angles and light move)

For a game engine ready female character. (Normal and AO maps are visible in the image with mirroed UVs.)

I spent quite long creating and fiddeling around with the high and low of this upper jaw, so before I move on to the lower jaw, I'd appreciate some improvement advice, that I can incorporate when doing the lower jaw.