UPDATED: Natural Light Test w/Canon 24-70 F2.8 v2

Shot on Canon 70D
no flash or reflector
7pm -8pm Olmsted Park
Note: shadows increases by a good margin in raw edit

Comments / feedback / critique all welcome! here to learn, thanks!

Hey i came over from the prime lens post that you made. These shots are great! If you want to make the background pop more you can use an adjustment brush in lightroom and bring the background exposure down or use the exposure sliders and bring up the greens and maybe some yellows. You could also take two shots, one for the background and one exposed for the subject and blend them together in photoshop but that is only really necessary if you have a really high dynamic range, like at sunrise or sunset. But in these shots i would just boost the greens a little bit so as not to distract from the model these are just my opinions. Someone else may have better advice.

Your model is beautiful and you portray her very nicely here, but a few things:

That sign!! It's wrecking your background and giving some bad leading lines (up and away from your model) and a huge, white patch of blown highlight that don't need to be there. Watch your backgrounds and move yourself or your model (or both, when necessary) to avoid objects that aren't, and don't need to be, part of your composition. This also applies to making sure you don't have poles/trees/etc "growing out of their heads.

Raising shadows; if you do this, gently adjust contrast afterward to prevent totally flattening out the tones in the image (unless that is a creative choice you're making)

Shot in shade; your color balance is fairly cool and it takes a bit from her natural skin tones

In all but the 2nd shot, I'd suggest bringing your highlights down a bit so that they aren't quite so harsh and pull the eyes from your subject

If you'd be willing to post a downloadable .jpg of one of the images, I can show you what a quick 30s or so in Lightroom can do for most of those points

Will do when I get back to the computer!

Great set!