As he said, the shoes.... The Clarks are hardly an upgrade, because they are too casual for most offices (don't lace up enough).
The pair of jeans has a marginally acceptable fit. The pants are too long (most of them clearly so) and pulling at the hips - they might be as well be replaced. White pants are not for business, by the way. The belts look adequate. The yellow shirt looks bad.
Wool/linen is not as cool as pure linen, even if the wool is very lightweight. However, unstructured linen would wrinkle terribly.
A navy jacket is too close in color to typical dressy blue jeans.
Post #2 was mostly correct, but patch pockets at the hip aren't necessary, though on a v-shape, they'll probably look okay.
The socks are okay. Most women aren't going to actively like any of the items, though. Sneakers will be too casual for many, the pants blah (jeans would be better), the sweater (color) boring and rather unmasculine.... Maroon/burgundy would be a better choice.