The studio's biggest sin came before that when they used DLC to paywall off major parts of the story in ME2. Anyone who didn't fork over even more of their cash got an incomplete game and a plot that made no sense.

The only major part of story of ME2 that got paywalled is the Lair of the Shadow Broker and I don't feel like I missed much by not playing it (at least on my first playthrough, second I had the DLC). And even if you take a ME2 save with that DLC to ME3, I felt like ME3 does a decent job of explaining what had happened.