One thing I've found with tabs in acrylic. Unless you are very careful, you can knock a chip out of the good side of the cut when removing those tabs. I use a multi-tool (ultrasonic) to cut those little buggers so they don't ruin the good side.
I would say going deeper per pass may cause more problems than solve. The forces go way up and the odds of getting melted plastic in the kerf go way up.
ShopBot Details:
2013 PRS 96x60x12 (Centroid upgrade)
4hp Spindle
12" indexer
Aspire
Rhino
Fusion 360
Ferrari 360
Prusa MK3S+
Prusa XL multi-tool