mompa, is this the specialist nursery that we have discussed before?
imo, a statement can and should be specific on all points, even at special school - there is nothing that shoudl be left open to interpretation (unless you are entirely happy that the interpretation given by the named placement will be the one oyu would give yourself) - if there is somehting happening which is in a group, for eg, the statement can specify: group size, number of teachers, and what qualifications they should have.
if it is the specialist nursery I am thinking of, I would want:
SALT quantified (and not be fobbed off with "it is delivered through the curriculum - it is and it isn't, at that placement, ime. and as soon as htere is a concrete issue that is worked on with your child individually, this is delivered by a TA, with unspecified training (at best in-house - which in fairness could be worse, as things go - at worst "years of hands on experience" - I have htis myself, but would not call myself an experienced TA!)
OT: do NOT let this be overlooked. this placement was shocking at OT support for my dd. get it specified and quantified - if the placement cannot meet what is specified, then maybe it is not the best place for your child? (if he has OT needs, of course!)
I owuld also get htings written in about:
meetings to agree IEP (ime, you get given it and asked ot sign it - no discussion allowed or encouraged)
meetings ot agree targets
proper progress reports, not just their report produced once a year - althugh comprehensive, it is no help in knowing what is going on daily/weekly
try to get a contact book agreed (this will probably not happen, but you can try)
hth