Other than PR, the other territories are, as you said, far too small to become states, but they could be attached to existing states, such as, e.g., adding Guam and the Northern Mariana Islands (and the Midway Islands and other lightly inhabited or uninhabited islands in the northern Pacific) to the State of Hawaii, which would make the state less Democrat.
That sounds good to me.
That leaves the VI. Attaching them to PR would not be good electorally.