Don't panic. All is fine and normal.

The first year in the ground, for a shrub, is a time to establish a root system and to build a body for the future. It takes about 3 years for your new hydrangea to fully mature. Feel free to shear them back to promote new growth and more branching. Prune Pinky Winky and Quick Fire to even the plants our and to create a nice bush. You will be rewarded next year. These you would typically prune in early spring. I've included a link below on pruning Hyd. paniculata.

As for the Oak Leaf the blooms browned because the plant is not yet established. Next year it will be much better. Enjoy.

Here is a link that might be useful: Royal Hort. Society Hydrangea paniculata

Just one quick note-
Be sure to stick a finger in the ground to check the soil around your oakleaf for moisture before watering. Oakleafs are very intolerant of having wet feet, and watering daily could easily overwhelm an otherwise happy shrub. Good luck, I bet your plants will all recover and be quite beautiful!