First one looks soft or slightly out of focus (potentially from using AI servo and it gently predicting a move and was wrong; that happens). I don't think its motion blur at 70mm on APS-C with 1/200s, but it may be partially part of it. I think its most likely just focus (they all miss now and then). Focusing on that face with a strong light background is going to cause fits for most cameras anyways as it struggles to know what to even cling to for focus.
2nd one looks sharp enough to me to not worry about it.
The grain is normal. While higher ISO values will increase apparent noise, if you shoot RAW, expose up a little (raise exposure when shooting by +1/3rd for example) and then drop exposure in post, the noise will not be easy to see. The 7D is a fairly noisy camera in general, but you can process noise out. You will get more noise from underexposing and raising exposure in post-processing to correct for it, noise pops out big time with that. So to combat noise, expose up a little (maybe +1/3rd increased exposure from your normal metered exposure here) and don't lift exposure in post. Then gently apply a light noise reduction with whatever software you use. Do this from a RAW file, not a JPG. You'll get much cleaner images. The 7D can make clean images easily upwards of ISO 800 with good exposure & processing. I would not worry about trying to shoot ISO 400 or less, practice at higher ISO so that you can use it when you need to.
That said, for someone with skin tone like this, I would look for backgrounds that are not bright or near white where possible, to help with nailing exposure.