Endings are difficult, but Trespasser shows that BioWare can get them right. The DLC is allowed to tell its own tale while better rounding off Inquisition's own, and at the same time set up story threads for the future. It acts as a fitting farewell to its cast of characters but also a prologue to where the Dragon Age world may head next.
A common complaint about previous Inquisition DLC was that it didn’t add anything to the main story, that it had no consequence. Not so here, where consequences abound. Whether it’s the consequences of a companion’s personal quest, or the fate of the Inquisition itself, it all matters.