Random note for those interested: Going from Rank 36 to Rank 34 in PoC made me go from 1% to 0%, which suggests there are 3500 players who have done at least 1 map in PoC. How this compares to previous weeks? Well, ~Rank 40 on Friday was enough to be 0%, but that's Day 6 vs. Day 3 so not perfect comparison
About candies: It takes 150 candies to get all 5 scenes of a girl. There are 27 girls with scenes in the game (the majority of which are the super-rare 5*s but who cares? ). 150 x 27 = 4050 candies for all scenes if you have most/all girls with scenes. If we estimate an average of 7 candies a day (they often score in the wheel but so do resources), plus 20 candies a week from PoC (21-30%), that's 55 candies per week = ~74 weeks to get all scenes (though whether you'll have every single girl with a scene by then is questionable).
IMO the reason the candy issue is so obvious is because it is more limiting than getting the 5*s in the short-term at least due to scene quantity (compared to games like FKG and MWA where every girl 3* or above has a scene so they can afford to be liberal in handing out the affection items; if they gave it out at similar rates, you'd end up sitting on piles of candy by the 3-4 month mark latest)