Changing the spring will have an even greater effect. It's possible to get Axis Lock-like ease of use with a quality replacement spring of lesser tension. All my Manixes get a McMaster Carr replacement. Alternatively, you can remove 3 coils from the stock spring an achieve a similar results. As with the Axis and it's rather weak omega springs, there is no backward pressure on the ball bearing when the knife is in use. Thus the most important aspect of the spring is it's length. It must be long enough to fully seat the ball bearing.
What you will sacrifice is detent strength---you will be able to swing the blade with enough inertia. If that's not ideal for your use, then replacing the spring is not a mod I would recommend.