I'll try & take some time tonight or tomorrow to write a more formal out response, but my initial impression is that you're asking the league stop thinking about itself & start thinking about the growth of lacrosse.
The first thing I notice about what you're asking is this section...
Band wrote:"Why not use B division as a "warm up" when it is appropriate? The goal of this league should be to promote growth, and if starting a new team in a division that is competitive until they can build their program to move up is how to do that then I don't see the problem at all. What about WSU? When they join the league they are going to get worked up and down the street (just like us). That won't help them build their program. They should get time to play teams that will give them a good game. If they improve and should be moved up then so be it."
Why not join the PNCLL & MCLA when your team is ready to compete at it's level? What's wrong with scheduling these games & building your team before you join the conference? Why should the MCLA differentiate divisions & then allow your program to develop under its wing? I see a problem in that Idaho, a larger public school, competing year in and year out with Albertson or Whitman (schools of much smaller size(900-1500 students)) is absolutely outside of the realm of fair to those smaller teams.
Recruiting problems for you teams most likely stem a lot further than just wins & losses. Whether Oregon is dominant this year, last year, 10 years ago or 10 years from now is not really a huge concern in my book. They are 1 of 18 teams. Granted they may be the model of how to build a program in such a short time, but still only one team.
If you don't feel Idaho program is ready to be in the PNCLL as it stands, you may want to be ready to address the board & the committee redoing the bylaws this season & prepare to address the conference at next years AGM. Jason Stockton would probably be the best person to speak with, as he is the president, & is not affiliated with a team right now. He may have a different perspective that meshs more with your view.