Increasing max size of Cross-world Linkshells planned ?

[Halivel]

If you multiply the 128 capacity by the 8 linkshell slots you get 1000.

And CWLS have 500 in this case. Noticeable difference, but not what you call "extremely limited" imo. Tbh I don't see much sense in implying 8 linkshells, given that they can't be connected with each other. You can't talk to person from LS1 without being in LS1 anyway.
Either way expansion would be obviously nice to have, I don't think there would be a single person who's against that. Even 128 was't a lot back when CWLS weren't a thing.