I am not sure, if there are some official requests forms for this type of request. If so, please let me know.
With Paper2D being quite some time without any update, I wanted to give it some love and introduce few optimisation. I found class PaperSprite having almost no virtual methods, so changes are extremely difficult to make in a clean way.
Would it be possible to mark following methods as virtual?
// PaperSprite.h
void RebuildCollisionData();
void RebuildRenderData();
void RescaleSpriteData(UTexture2D* Texture);