John,
I see your point and it is a valid one. IMO your idea of separate leader boards would be the best option. I think It would be poor form to forget the people who came before... and might give them a new challenge, and bring them back again with 2.0 if they stepped away a little while. I understand some people have gotten bored with the lack of challenge the earlier versions brought.
Joey
Playing on a AT&T Samsung Infuse (SAMSUNG-SGH-I997) Firmware 2.2.1
1.3.4
(V 2.2g) Dwarf, Human, Gnoll, Hobbit and Elf Rangers all created
200 hours and loving every minute of it !!!