I burned up a fair number of gecko drivers using specs that they specifically said would be fine. I don't mean just what they printed on their website but also what one of the three Ms said to me directly.
They used to feature one of my videos on one of their playlists. I contacted them one day and frustration and told them that I didn't want my videos associated with their business. That should tell you how well it worked out for me. I know of two machine builders who quit using gecko drives because they said they got tired of replacing them when they were running them within spec.
If your gecko drive is working and you're happy with the results don't monkey with it.
I had servo drives fail when running under spec, but continuously at those loads. I had stepper drives fail when I was running them at occasional peaks up to near spec.
These opinions are my own based on my experience and I make no claim that my opinions are based in a mind of greatness. To be cliche, your mileage may vary.