I personally don't mind the pace that this has been going, because it feels like it's maintained a steady pace. If anything it might be going up ever so slightly, but I enjoy seeing these two interact and slowly help one another become better people. Takamine helps bring Sakura out of her shell, all while Sakura helps Takamine chip away at the seeming mundanity of her life. I appreciate that the mangaka has put their focus not just on their romance, but on building a genuine connection between these two that one could realistically see as sprouting into romantic feelings.