A rare candy is more rewarding than any other game feature
Not if you have acces to alot of gyms
I like that its in there, but 1 candy from 4 pvp battles or up to 9 from a level 5 raid. Easy choice for me.
PvP brings a few nice bonusses as far as im concerned, but nothing so shocking i feel like i missed out if i dont battle for a few days.