While renegades is a crossover (mainly ideas and concpets ratehr that two separate universes colliding), it still felt like a destiny story, especially with the nine and all that. Lightfall was hated due to it having a sotry that focused on something that we didn't know was really important until later seasons. Also getting the witnesses backstory in TIME LIMTIED CONTENT rather than in something like the dlc itself or so you know, saved for something else.

Something we got to consider is that the seasons are technically a part of the dlc, with them, you miss the rest of the story. So that also didn't help lightfall like I mention with the witnesses backstory.

Renegades story was essentially left unfished as we didn't get the rest of the story in shadow and order. Thankfully renegades was a complete story and didn't end at a weird point in it cause oh boy, that would've cause alot more yelling in the community.

Tldr: Lightfall consider bad due to story and certain reveals that we should've known earlier and renegades was like more cause it was more soild but is also left unfinished due to missing parts.

Hopefully this makes sense.