Please advise whether the following sentences are correct:
(1) Some expertise is required in handling this project.
(2) I had (some) reservations on this point. (Does it need to add the word 'some'?)
(3) I agree to the Panel's recommendations.
(4) I agree with the Panel members.
They all look fine to me. For (2), I would use “some” myself, if only it sounds better that way, but I don’t think omitting “some” would be wrong.