Ya, it makes a lot of sense in the CLAw to have that function since it's SOOO focused on exactly what you want to loot. The way I implemented it, there was a very small hit to the overall performance. I was really pleased with the results. I have all kinds of other MEGA search functions like Sum of STR+DEX+INT, Sum of Skills, etc, so it's just yet another MEGA search function.
I have never left UO. Take breaks (am on one currently actually..) but never really left. I still have the first house I ever placed back in 97. That's alot of monthly dues!!! heh