Judging by his comment they felt too linear, so blew through their travel too quickly, which the obvious option is then to increase the air pressure, but this ruins small bump sensitivity.
The answer is to reduce the volume in the air spring, so they become more progressive, there are a number of ways to do this, the easiest is to reduce the volume of space for the air to fill, so pop some float fluid in the air chamber, or you can add spacers - like the Pike enables you to do.
This means you can run low pressures, so small bump compliance is very good, plush - but the stroke of travel ramps up at the end, so you dont bottom out the fork.
You can do that at home, a 22 or 24mm spanner/socket, take the air cap off the top of the fork (after letting the air out), pop 15ml of float fluid into the air chamber, and done. That'll cost you £5 and 10 minutes to do.