He has 0.3 assists per 90 from 0.11 xA per 90 from open play. This is not really a thing that you can count on to stay indefinitely. Although he's much better at set pieces than Bruno, that's not really debatable.
In almost twice as many games, this is a bit of an important point. He's always been an excellent set piece taker too and got a ton of assists from corners and free kicks.
What do you mean by this exactly? Even completely ignoring Bruno playing pretty much every position outside of defence at some point of this season, their average positions are pretty much at the same distance from goal when they played together in midfield, defensive contributions are easily on Bruno's side. Eriksen is better at recycling passes, but I'm not sure how much of a restriction for him it really is that would be lifted without Bruno and I'm really unsure whether this is a massive benefit that outweighs everything else.
Neither am I, but I'm much less of a fan of Fred, when there is no need to man mark the best midfielder on the other team.