My way of thinking at present, for CCW, is as follows.
1. Paddle is preferred over belt-slide for everyday use with covering garment, so that if you go somewhere and need to remove garment (such as eating lunch at restaurant), you can by leaving paddle rig and gun in car. BS is a lot of trouble to take off belt in this situation.
2. If you do insist on using a BS, but encounter a regularly-occurring situation where you need to remove the covering garment, as I do, then use a minimal, "Yaqui"-type rig, so that you can take gun out to leave in car, but leave rig on belt. It's so small that it's not so conspicuous to leave on while empty. For this reason, I've ordered a black Milt Sparks Yaqui. It shouldn't look much different empty than a pager, to a passing glance.