We travel frequently on the Thomson Dreamliners always in the premium cabin and I can confirm that all the 789 premium seats have windows, this is an improvement over the 788. Also I am certain that non of them have recline restrictions, due, in part at least, to the fact that all the forward cabin seats now use a sliding reclining mechanism which moves the squab forward as much as leaning the backrest to the rear.
However you should be aware of a significant defect in the 789 premium cabin due to the removal of a valuable relaxation area. On the smaller 788 there is a space behind the rearmost row which runs between the centre aircraft doors and this is great for exercising, stretching your legs or generally socialising. For me, an old fart with dodgy joints, this is wonderful. In the 789, due to the rearranged seating in the stretched fuselage this passageway is now in the rear cabin and, in addition to being busy with passing traffic, doubles as a galley.
In short, the benefits of the premium cabin are reduced as the crew actively stop passengers using the only remaining free space (by the front left hand door to the side of the forward galley) by cluttering it with their personal bags and cases so they can use it for their own purposes. If you have a choice, always go for the 788 version