They can remove or nerf it.
You can still find people and enter go to dungeon and summon if you don’t want to use RFD and it does not removes that from the game, even you can enter the dungeon via RFD with the people you want.
By simply supporting removal of the RDF and taking my choice to use or not use it. I will suffer leveling till 58 if want to do any dungeons due to how big azeroth and lvling scales really thin so finding 4 more people and doing any dungeon would probably waste of my time and other on xp gain perspective, also on 80 I will have trade, dalaran general, capital city general, frequently people use yell to find members for their parties. This is also removes the social aspect of general chats that when you are leveling due to people going to spam to LF a tank for nexus on Borean Tundra while people might want to chat.
Thanks buddy I will suffer everytime going to Tanaris and summon my party to Culling of the Stratholme.