I had stutter in system without features too on landables.Nailed it (I Hope) - Features are the root cause - systems with bodies but no features seem ok. However if there are features (Bio Geo) then you get stutter.
By the way I like the new system, but I miss the numbers in the locations list. When mapping a planet, you can see the POIs, geo1, geo2 etc. But it not show the numbers in the list, so if I want to visit another that for example on the sunny side, I can't select it from the list. FDev, please, bring back the numbers in the location list.