I just searched about it and seems like ranger's will have owls instead of falcons. Sound's like it's a compulsive change and you don't need to find any NPC for that. Yet to be confirmed tho. Have you tried summoning a falcon?If it doesn't change that means it isn't coming with this patch.
i will try this later,idk if come in Heroes Trail part I,i just know that comes in Heroes Trail *-*