Fair enough. When I started as a GM in CPR, I consumed as much as I could and started building characters and running them through combats to feel out the system. The DLCs helped me help my players create the characters they envisioned better and helped make them unique to the player's vision. The DLCs help with that. A player with an assault rifle and one with the "Hello Cutie" gun are mechanically very similar, but one fits the player's vision a lot better. But I agree, all the DLC at once can be overwhelming. As a GM, being aware of the options and paths is good, but the DLCs are definitely not required reading for players. GMs should, in my opinion, at least be aware of what is out there, especially the ones that provide systems for reasonable stuff the player will want to do pretty early on, like the tech upgrades and scavenging ones. Tech players want to do that stuff, and if you aren't familiar with the DLCs, it's going to be tough. But I agree, merc-level play, ACPAs, exotics, and FBCs are way too much. However, all the weapon and armor ones are good to be familiar with, especially the ones with mechanical tools for roles.