I think it is a good idea to eliminate 1/3 of the highest and 1/3 of the lowest marks for GOE and PCS and take an average of only 1/3 marks of the total sample (or even less) for the skaters result. That way people who are judging will try to be more 'objective' maybe, knowing that their marks wouldn't count otherwise.
If you eliminate scores element by element and component by component, as is the case for judges now, then people who make an occasional mistake or are off (for whatever reason) in their perceptions of one skater would still have most of their marks count.
Of course, if you drop as many as top 1/3 and bottom 1/3, then fans who are scoring honestly but in a lower (or higher) range than the rest of the group would get most of their scores dropped.
Most likely for someone who is consistently low on PCS. If you're mainly doing this for GP and senior championships, there won't be much room at the top to be consistently on the high side.