adjustment of converter lock

[tmsbandman]

I was playing with my custom 87 performance tune, and adjusted the converter lock to it's lowest settings (just to see how it responds.) Gryphon SAYS my AVG ECON is better, and I'm OK with it from a performance standpoint. But-Is there some other trade-0ff? I understand engines decently well, but not trannies. This adjustment causes the converter to lock at a lower speed, right? What is the benefit/risk of adjusting the converter lock points on decel (4-3, 3-2, 2-1.)

Thanks,
Rick