Jonathan,
Generally using named parameters makes the code more clear and readable. I think that understanding the code after the fact is more valuable than saving a few keystrokes up front.
I think it makes the code more accessible to someone is isn't intimately familiar with openacs, which is huge and takes quite a while to grasp the entire thing.
Another point is that using all named paramters in a proc is more clear than using a few named paramters and a few positional paramters which some of the original procs do.
Anything that makes it easier to learn openacs is a plus.
