concrete functor and monad transformers

#97Applicative methods of RWST are not all inlined

For example, this specialized use of liftA2 does not get inlined:

assoc0RWS :: RWS r (Endo w) s a -> RWS r (Endo w) s b -> RWS r (Endo w) s (a,b)
assoc0RWS x y = liftA2 (,) x y

Can we add an INLINE pragma to liftA2, (*>) and (<*)?