SQ: These look pretty solid. Depth is good. I would just bring your heels in a touch so you have a bit more toe turnout and then push your knees out a bit harder from the start. 10lb jumps don't last very long, so do run yourself into the ground with them - move the 5lbs.
DL: Your shins are a bit too vertical in your initial setup. Drop your hips a bit and get your knees flush with the front of your arms. Then make squeezing your back separate from trying to pull. Squeeze first as if trying to break the bar off the ground (push your belly to the floor is a cue that might help if chest up doesn't). Next pause on the ground after each rep and breathe and squeeze your back again - no touch and go. In terms of grip strength, first make sure you are using chalk and then you can use a hook or mixed grip. Your grip will still get stronger if you use a mixed grip and as it does, you can start using a double overhand at heavier weights.