What exactly am i missing if i dont buy eclipse?

[メルクーネオ]

So the reviews are keeping me from buying it, am i being walled from important content? do i need this expansion to get to the maximun item power?

[>//The_FALCON]

what the ♥♥♥♥ is a eclipse

[EckyThump]

Eclipse? Lightfall?
You won't get the campaign (which is the bit most of the negative reviews are for) or the Strand subclass, Lightfall's exotics like Winterbite, access to Lightfall's Hypernet strike as the Nightfall version, or access to the Root of Nightmares raid.

You never need an expansion to get maximum power, but the current expansion offers more sources to help reach it.

[Kylito]

The negative reviews for what I assume is Lightfall is pretty standard, although in a bit more force this time around. I think Witch Queen is the only D2 DLC on steam to have remotely positive reviews, the majority of the D2 community is very negative with every release.

What you get:

Current season pass (S21 lasts for another 6 1/2 weeks or so)
2 Exotic quests, with a handful more from various sources
Main campaign with legendary difficulty option
Campaign weekly missions, replaying them on higher difficulties for rewards
Neomuna secrets and collectibles
Root Of Nightmares raid
Plus more I might have forgotten about