nonstaple
nongood
unexcellent
not so hot
ungreat
not much cop
ill-posed
obscure
unfantastic
unsplendid
nonexemplary
nicen up
unfabulous
crook
louche
unrecommendable
ill-formed
nonstandard
unrenowned
nonpopular
unlively
ill-considered
nothing to write home about
second string
nonfancy
nonappealable
nonlobar
unsound
unrelishable
unmarriable
undelectable
poorlyish
unmarvelous
unbrilliant
nonmainstream
unexceptional
crappo
semidecent
unfriendly
unpleasant
unfancied
nonlitigable
inauthoritative
unnicely
unsaturable
nonideal
unauthoritative
unideal
unfanciable
nonauthoritative