Over the last ten years, out of the 20 teams that finished with a no 2 seed, only four ended up hosting the Championship Game.
There is only one true home field advantage in seeding the NFL playoffs, and that is the no 1 seed. They only need to win one game to get to the championship game, and they have guaranteed home field. This gives them an advantage that none of the other six teams in the conference field have.
At no 2, you now play in the wild card round. You host the game, but so does no 3 and 4. The bye you used to have is gone. Now you have to slog through that game, weak opponent or no, and hope you don't lose key contributors to injury.
The only advantage the no 2 seed now holds over 3 or 4 is hosting the divisional round playoff game, but that advantage was there before. You still draw the highest ranking seed. The difference now is you don't sit out the wild card round to heal up and get some players rested.
How it's going to play out, is you're going to see more lower ranked teams winning in the divisional round now. More upsets. That's what the NFL wanted.
Rams need to win their division. That's what they need. There is no home field if they end up as a wild card.