The only thing i disliked was how accent colors changed text colors on settings and app colors(ex: samsung internet navigation bar colors). But i only wanted my quick settings colors to be updated, and it was a quick change from goodlock, so doesnt affect much.
Font you can always update from settings under display. I personally use samsung sans downloaded fron the store and it looks the best imo. Also, i dont find the emojis cluttered, that may differ phone to phone.