Agreed.
Unless the Inquisitor is returning please for the love of god leave last companions out of the party.
I'm sorry but the constant dragging of NPCs and enemies from one story from the next but when people want a PC to come back the devs cry "it's not about the PC it's about the setting!" is wearing thin. If it's about the setting give us new stories with new characters without old plot lines related to the old PC dragging around like a bit of road kill stuck to the tire. Clean breaks please. This halfbreed we want to bring back the NPCs but not the PC is lame cause we have to either relay on metagaming or our new PC has no reason to give a damn about them.
Sure, a the new PC needs a new reason to give a damn... but so what? How does that outweigh the benefits?
I think you're making a bit of a false equivalence between a PC and a NPC. NPC's are often critical to the world-building elements and conveying themes of a setting- but a PC, by their nature as the avatar for the out-of-context player, rarely is. Reoccuring NPCs can provide a frame of context that a returning PC can't, because a PC isn't a context of a setting- the PC is the actor, but very rarely the mover of a plot, especially one between games (where, by design consideration, every game has to assume the PC-player is a newbie who must be re-introduced to a plot.)
I certainly don't think that all characters should be returning, but returning NPCs bring weight and other vague things I can describe well. In DAI, Varric was an ideal lead-in back to Hawk- who was an example of the troubles of any PC who isn't effecitvely killed off during a game. Cassandra and Leliana were both old characters with new plots, and new character development, that could stand on their own... while also convincingly bringing in the Chantry authority and helping establish how the Inquisition was a spin-off of the Chantry and old regime, related but distinct.
The value of a reoccuring NPC rests with the companion, not the PC. In ME3, most of the companions added little to the plot even though Shepard reoccured. In fact, some of the companion plots were weaker than if they were dead/absent. But some, like Mordin, provided a familiar meta-familiarity that gave their scenes and positions more relevance: Mordin's position on the genophage in ME3 still requires the meta-knowledge of the player of the events of ME2 to make sense as a character arc. Shepard might know, but the player is still a meta consideration.