I thought this referred to when they announced the change in direction after Taken King launched, that there wouldnt be any DLC for the taken king, but eververse would fund the free live events instead.
The "too hard to make content" was also known that the system they were using wasnt very friendly to allow them to make even small changes very quickly ( it could take 9 hours for the computer to load up a map area even if they wanted to adjust a plot point, then hours to code back into the game)
However that shouldnt excuse them for D2 content, as they should have learnt from D1 and made D2 great, but it seems D2 was made out of the D1 base game which is why its missing everything that was added
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Yeah, that's exactly what it refers to.