I loved gold per sec items , they were so good for support :<
About gp , his remake wasn't exactly a nerf , it was a remake. He can do a way better jungle now and he is more useful generally that before , his [E] is very good for ganking and for teamfights since he doesn't need to deny anymore , but people were used to old GP and they think he got nerfed.
About Malz , well i wouldn't exactly call him op , still he has no escape ability plus he is based on a combo (W/E/R) which gets destroyed on end-game by QSS , dunno i found him ok to be honest..
But i really loved that nerf on Trynd's [E] , he will need rage to use it not free anymore :3