I think Gidget's main thing is going to be keeping her focused.
Alex does a very good job of planning her ride. She does tend to get a little pissy, particularly after that keyhole run I saw her getting a little humped up. I'm sure she's probably just excited but has she been chiropracted lately?
Another thing with the focus is shoulder control. I'd get Alex working a lot on getting instant responses out of that shoulder. Haunch turns, rollbacks, counter arcs etc that will get her a lot snappier. She looks like she kinda loses her focus, bends, but doesn't follow through with her shoulder. (Second barrel is an example of that)
Also, I'm not sure if she's topped out yet or not, but it might be beneficial to get her breezed. Maybe even against another horse. See if she can't find a new gear and get even faster. She's running now, but it looks a little bound up to me. I need to do this with Selena too. She's topped herself out and I need to find out if I have more horse in there or not.
Overall I think letting Alex use her is going to be a good thing for her. It'll get her seasoned and thinking more and when you get her back she will be a better horse. Maybe see if she'd do some slow time only's with her too to deal with the issue of her being hot.
That's my critique anyhow, I think the two look pretty good together.
Pssh.I didn't pick up the wrong lead
It's called a counter canter...
...A very advanced maneuver.