Yeah John spun wool into gold so to speak.
They spent all the time making Rey great and Finn got nothing. Your right it wouldnt takeaway from Rey but they were afraid of it hence he doesnt get s*** and I suppose I would be to lol plenty already consider him more likeable so making him better might very well deflated Rey. Not that I agree because plenty love Finn because he is weak and no threat so making him that good reduces their interest.