I don't agree, Dave.
Basically, the idea of separate leagues is to get people with the same deck strength to play each other in a certain league.
Collection power like it is calculated now, will never achieve that, just because alpha/promo/gold foil are weighted heavily, and all playable cards are taken into consideration.
To me, it would make more sense to count only the highest level of a card, and give the same value to all editions. I mean, there's no difference when it comes to gameplay whether a card is an alpa/beta/gold foil summoner of a certain level.
Once again, they are looking at it from a monetary point of view, not a gameplay point of view (surprise, surprise, lol)
If you see that my deck is complete and maxed - but beta and regular foil - and I'm only in 99th place in the list of collection power, I really wonder how they are gonna go forward with setting tresholds. The results are already completely off, just because of those - imho - wrong parameters....
I do get your point about a good player being able to go up a league by buying a gold foil, but if he can do that, so can all the bots... which means that pretty soon, we'll be right back where we started...