Heard back from the Researcher at Oklahoma State for these above pictures. I'm sharing her response below (with permission) for others who may be concerned including her advice on the miticides application:
{At this time, the growth on the roses appears normal and healthy. The new growth on roses often has a red color and the leaves may appear abnormal until they fully develop. The number of prickles (thorns) often varies from plant to plant, so I wouldn't rely on this alone. I do not think you have anything to worry about at this time.
One suggestion when you see something unusual is to tie a small flag on that section of the plant. Take a photograph once a week and see if what you thought might be unusual develops normally. If you are extremely concerned, you may want to apply a miticide every two weeks in case the mites carrying the virus should land on your plants. Good miticides for home gardeners are a horticultural oil (active ingredient may be neem oil, mineral oil, etc) or a product with the active ingredient of bifenthrin. These products are most likely available at home garden centers in your area.
Lastly, although rose rosette is reported in California, it is not that common in the eastern part of the state. I believe most of the reports are from the mountainous areas that are more to the west. Usually, the disease is present on native roses in those areas rather than cultivated roses in landscapes. To my knowledge, it is not found in your area at this time. }
She sent a follow up to clarify the miticide advice:
{Please note one clarification. The oils are one product that can be used to prevent mites. The other product (bifenthrin) is a second product and I do not believe they are available as a mix. They may not be compatible if you tried to mix them.
The primary bifenthrin product that I am aware of for home gardeners is this one:
https://www.fertilome.com/Prod...
It is not specifically labeled for mites, but is labeled for roses. Other common rose pests are aphids, thrips and Japanese beetles and the product is labeled for those pests. So, you can treat roses for those pests and it also happens to control the eriophyid mites. My suggestion to home gardeners is to alternate between the two products (oil and bifenthrin) every 2 weeks throughout the season. So, at the beginning of the month, you could make an application of an oil and 1/2 way through the month, an application of bifenthrin.}
