i feel like most people saw the parallels, but aren't discussing them. will's still able to tab into the hive mind, just like in season 2 after the mind flayer attacked him and he's also communicating the same way: art.
this time, the others know that he's tapping into the hive mind (and in turn, vecna's mind), which they're probably going to use to their advantage sometime in volume 2 or 3.
vecna is still using the same tactics that he did in season 1, except, now he's making it seem more appealing by inviting the kids into his memories/this sort of glorified version of the creel house that we saw in season 4.
there were three other kids inside of will's vision, all of which are most likely in the same place as holly (venca's memories/the creel house). we haven't seen them yet, but i feel like they're going to be important characters in max and holly's storyline this season.
i don't know if it was just me, but the third kid in will's vision of wherever vecna is keeping holly looked very similar to 12 year old will. i might be going insane, but if i'm not, that fact makes me deeply uncomfortable..