Please for all that is holy, let us have some kind of spawning with friend/friends. Limited in number and/or time is fine. Large factions won't be slowed relatively to medium or small factions. Solo players get a tiny boost, but are so insignificant in terms of power that it doesn't help their end game prospects. And group oriented casuals are noticeably discouraged from playing.
Limiting it so that only random spawn characters receive the spawning item, and there's a limit on how many they can help spawn should be sufficient should it not?
P.S. Has charter stone spawning been removed? Otherwise I don't see what the issue is, alt abuse is mostly mid/late game now that dig starve alts are gone.