The problem with acrylic dust covers is that they easily become statically charged and then attract dust. You might say this is good as they pull dust up from the turntable but generally they just bring more dust into the area.
Light cloth coverings can have nasty interactions with stylii...
I have never had a big problem with dust. I have not used a cover since I sold my Linn in the mid 80s.
I hold a carbonfibre brush against the revolving platter before I begin and against each LP side before playing. I don't see a lot of dust and hear very little noise. I rarely have to clean a record.