Tweaks and adjustments are all part of of the audio experience. Some work and others don't. However, the construction and sound of some speakers may or may not suit an individual's taste. An initial purchase may be very pleasing but after time something may be lacking or more unacceptable in some manor. Part of many games.
Magico speakers aren't budget items. If drilling vent holes suits one's preference then so be it. However, initial purchase of a quality speaker should come with careful critique and it's performance. My statement...."Why buy speakers at a large price that don't sound good from the start?" is my opinion. To echo one of millercarbon's statements....."If it doesn't sound good out of the box forget it".