The approach to Nomad and Shapeoko feeds and speeds can be completely different. The Shapeoko has the benefit of sheer power and speed at the sake of rigidity.
I adjusted the feed rate in that example to match the MRR you had before, makes no sense to go backwards right. Its a safe bet that you could probably increase the feedrate to around 100ipm which would be an MRR of 0.50 inmin / 12.7cm. This kind of cut would benefit from your mister and you’ll definitely notice some heat coming off the chips.
Finishing doesn’t remove much material which means it doesn’t create the same amount of heat. Even finishing gets a minimum chipload for CAM, been working well for me. Tool pressure, tool engagement (constant = good) and chip clearing are important
Actually X linear rails offer huge rigidity improvements while being pretty simple to make/install. And if thats not enough, @DanStory designed and offers a Y linear rail kit. I think we all dream of those things but its surprising what a few rails can do.