Given that the overwhelming majority of players (fans or not) hated the course of the main story of Fallout 4, mostly from the arrival of the player at the Institute would imposs'vel or even very difficult to Bethesda do the same as Bioware did with Mass Effect 3: offer a more satisfactory and coherent alternative ending with the basic premise of the game?
Explaining: an alternate ending in the form of DLC, which gives the player the option to explore which way to go when you have to teleport for the first time for the Institute.
After all, nothing that the player does affects the actions from that time, exemplifying:
1: The Institute must be destroyed if the player to align with any other faction.
It would be interesting to offer, in this case, the only option to destroy the robotics division and preserve the other, after all, the Community desperately needs resources to rebuild.
2: Two factions must be destroyed if the player line up with the Insitute.
Okay, FO4 is a FPS with RPG touches. But where is this touch of RPG? You as a future director NOT have decision-making power at all, even if it means to ward off discontent. Block the player is not RPG feature, but linear FPS.
3: If the player is aligned with the BoS, both Insituto as Ferrovia must be destroyed.
With the Institute destroyed that danger Ferrovia offers, since there are no more synth to rescue.
The most serious issue is the lack FO4 option Nonviolence: everything is solved on the bullet. In real life it is not so, there is the time to fight with weapons and the time to digladiar in words.
I hope this outburst serve some inspiration.
Remembering that I am playing FO4 practically whenever I can only feel disappointment at the shallow history, including the grating side quests.