Been a long time since I killed an orc pawn but had to do it once I started a toon on Phinigel. So far I've seen them drop an ALE and, pretty cool, a BACKPACK. Other than that, just a couple of coppers.
What people forget about orc pawns in CB, evidently, is that they're PLACEHOLDERS. I've zoned into CB and found orc pawns up everywhere. I think this is because some players don't realize that and if the orc pawn doesn't provide XP they leave it alone. Which means that spawn spot has no chance to spawn a centurion or a legionnaire. I just passed thru one Phinigel instance or CB, cleared all the orc pawns, and when I went around 10 minutes later several legos had spawned in their places. Lego pads give 5% XP apiece at level 10 so well worth the effort.