Question about image scale

I have been recently taking outstanding planetary images with a 9.25 f/10 sct, 2.5x Barlow, and an asi 462 mm which has a pixel size of 2.9 Mp. My question is if this is a good image scale or not. Because I’ve gotten to a point where I have every thing almost perfect in my system and was wondering if I needed a different pixel size or different Barlow to get that last bit of clarity out of my images. I only photograph under very good or perfect seeing conditions if that helps.