Nah, is not like they never peaked at each other’s stream to figure out mechanics. The main reason of the lack of raid completions was light. 99% of players didn’t even get to go past half due to light levels.
The raid's light was flat across the board aside from Calus, who's 10 power higher. Back in Year 1 though you could kill stuff that was 60 power above you versus now its 45. So if you were 250 power (which 75% of players I ran into that day were most certainly at or above by 10+) you could do it and then the loot drops would bump you up even more not to mention the raid mods helping out from armor drops.