This looks good!Overlay and multiply works great for comics - it doesn't have to look less varied (don't forget that you can change colours you're using on those layers!) but it makes things so much faster compared to hand-picking EVERY shade.As for changes - maybe drop a tad more light/shadows on the areas that aren't edges of objects/people. You don't have to do it a lot but a couple more spots of light unattached to lines can make all the difference! It's too easy to get used to only shading/highlighting along your lineart and it's just something to keep an eye on (I do it too with my own stuff).