Drms have been an interesting point of discussion so far because to me they feel like a very solid attempt at bridging traditional instanced content and lw story, no, not the strike to raid sort of way but more fundementally of lw content and group content in general.
They feel very much like campaign missions from the original Guildwars in the sense that they are replayable and work well as group content due to cms and scaling.
Even if after EoD the contextual aspect of Drms has no place (no more dragons, no more dragon responce missions) in guild wars 2, i think the gameplay aspects still hold good value to this game. Gw2 imo stands to gain alot more enjoyment and replayability by incorporating the format of drms into the lw instances, story beats and even expansions moving forward. Structured, solo or group based instances with better made encounters than you will find in older lw or ow scenarios that can also be replayed for rewards and come with a cm. In theory and even in practice i think this works rather well as a way to make gw2 feel more replayable and social.
Ofc, the lw releases under the champions name have all been rather underwhelming, that is to say, just giving us instances which are also replayable and nothing else doesnt really excite the players. Thankfully i dont believe thats an issue with drms themselves but rather to the unfortunate cicumsrances of getting the opportunity to work on an expac mid lw.
Drms reuse the lw instances so they should be far easier to make along side the content we've come to expect from lw (new maps, map events, achievements, strikes etc). With this i really urge the studio to take a good look at drms and try to fit them in lw or expansions after eod when the dust has settled and the studio has a clearer view of the future.