The poor reputation of Autel for customer service is what has largely kept me away from their drones. They could be a "contender" if they could ever fully get it together.
First, the
Mini 3 is an excellent little drone. The video isn't
quite as good as the bigger drones with variable apertures. Not sure about comparing it with the
Air2s. If weight isn't an issue I would point you toward the
Air2s with the DJI RC controller which is now compatible. Yeah, more expensive because you'll have two controllers, but you'll appreciate the stability of the
Air2s. I see you're in the UK, so you may be stuck with the
Mini 3. It's a better flyer than the Autel Nano, for sure.
The DJI RC is really smooth comparted to the RCN1 controller, at least from my comparison flying a
Mini 2 with it. I strongly dislike the RCN1 and have from the day I got my
Mini 2. The controllers from the
Mini 1 and certainly the
Mavic 2 are MUCH better. The only disadvantage that I see with the DJI RC controller is that it does not have a separate port where you could connect a phone or tablet. So you are stuck with the built-in screen. I sometimes like to fly FPV/VR and the DJI RC and the
Mavic 2 controllers, having active USB ports allow for various viewiing devices. Back to the
Mini 3....
The
Mini 3 is pretty formidable. It's got longer props than the
Mini 2 or
Mini 1 and will resist fly aways in strong wind (to a point). Seeing as you're in the UK, sadly you cannot take advantage of one of the greatest features of the
Mini 3- the extended battery. While immediately weighint over the 250g limit with the ex battery, the thing flies forever. Perhaps it's my mistake, but I don't keep watch on battery life with it nearly as much as I did wiith all the other drones and batteries I've had.
As far as settings go, that's personal taste. Lots of videos on how to set up the pitch, yaw and EXP. Once you get the basiics down you have to go out in the field and set them as you find them best for you.