can change existing articles (if DDL=1) or add new ones but won't automagically appear at each sub
I find it convenient (to avoid the rip&replace) to add new table articles in their own pubs meantime
then can merge the n pubs into 1 at quiet time (e.g. Sat) when can tolerate R&R
should share DA using sp_addpublication @independent_agent = false to avoid overheads
HTH
Dick