Hm, once it's in the ground you really shouldn't disturb the roots any more. It may have sustained some more damage to roots from the loosening process.
How about some mulch to keep the ground more moist and cooler going into summer? A nice thick layer of wood chip mulch all around there will help a lot, I think. It will reduce your watering chore going forward, and help keep weeds down, too. Remember there are, or will be roots out beyond the spread of the branches so mulch and water out away 2ft. or more from the base of the shrub, too. You want to encourage it to put out roots.
Don't ever use rock or rubber mulch, btw. It doesn't insulate well, and heats up in the sun so really has an opposite effect to what a good organic mulch will do.
Once it seems to be perking up, start very sparingly giving it some diluted fertilizer. Again, water it in, in a wide circle around the base of the shrub.
