I have been using the RA2 pro in light burn and it works just fine, so you shouldn’t need to change just for that reason.
I noticed that your test cup was a hydro flask. I basically went through the same steps as you, and was thrown for a loop on the heavy duty powder coat of the yeti’s, hydro flasks, etc. I just wanted to mention that I have had the exact same experience on my d1 when trying to engrave hydro flask brand items. Yeti’s have worked really well, as long as you slow them down to 50-100 mm / minute. Yep, per minute. So, the question for me is whether this is just a property of the specific brand (hydro flask), how they prep their finishes, etc.