The Devs apparently learned very little from the bad aspects of Eureka.

[TalithaSolarien]

I think that person meant that 24 and 48 man bosses are limited in practice when there are only 1-5 people in the instance later on like in Eureka.

That is not the case, at least not after the latest nerf. I usually see 40-60 people on average in the zones, enough to complete any weapon/gear.