One point of reference might be how LEGO modelled parts for LDD, generally it's a good compromise between accuracy and number of polygons (I said generally because some LDD parts are really off!). Bottom of parts is generally detailed, but... not baseplates! This can be easily explained because stud-intensive parts are very heavy! Cavity below brick studs is not modelled either in LDD.
Just to throw in some figures in the discussion, here is the top-5 of the most heavy LDD parts, after a raw conversion to LDraw:
Part / Name / Filesize
4186 / Baseplate 48 x 48 / 14.921 Mb
3811 / Baseplate 32 x 32 / 6.606 Mb
91405 / Plate 16 x 16 / 4.190 Mb
30072 / Brick 12 x 24 / 3.987 Mb
54779 / Boat Hull Unitary 51 x 12 x 6, Top (more or less equiv. ref.) / 3.825 Mb
To compare, a big sculptured baseplate (but studless!) is "only" 1.301 Mb (53588). And 88293 dome part, that has reinforcements (but no side ribs) is a mere 0.115 Mb.
In the light of this, I definitely don't think that increasing stud structure complexity (especially for baseplates) is a good idea...
Just to throw in some figures in the discussion, here is the top-5 of the most heavy LDD parts, after a raw conversion to LDraw:
Part / Name / Filesize
4186 / Baseplate 48 x 48 / 14.921 Mb
3811 / Baseplate 32 x 32 / 6.606 Mb
91405 / Plate 16 x 16 / 4.190 Mb
30072 / Brick 12 x 24 / 3.987 Mb
54779 / Boat Hull Unitary 51 x 12 x 6, Top (more or less equiv. ref.) / 3.825 Mb
To compare, a big sculptured baseplate (but studless!) is "only" 1.301 Mb (53588). And 88293 dome part, that has reinforcements (but no side ribs) is a mere 0.115 Mb.
In the light of this, I definitely don't think that increasing stud structure complexity (especially for baseplates) is a good idea...