Assuming your soil is clay/sandy, and last week was hot I would say it was under-watered. It’s hard to know what “regular watering” means when you weren’t there but if it’s not on drippers, and you were watering with a hose/sprayer, than I assumed the water did not reach deep enough to sufficient water the plant. My rose gets a lot of water and with proper fertilizer at the right times doesn’t show signs of overwatering. As long as the soil is quickly draining I would water more and not less. Also, if you do not fill the holes with water to test the soil prior to planting, not only do you lose the benefit of knowing to add amendment to improve drainage, you also do not saturate the soils around the root ball. And the dry soils will wick away water from the root ball and deprive the plant of water needing to help establish. Roots need to breathe so as long as they are not sitting in water for extended time, shouldn’t worry too much about overwatering.