I don't think too many people are confused about this aspect of the weekend, considering it was the same concept during the first double exp weekend as well.
Averaging it all out, if you worked for 10 hours at CONSTANT double xp, it would probably work out to be the same (or near) to the value of xp you would get with the current 2.7x exp and degrading every 45 minutes.
I think the thing that more people will be confused or angry about is the nerf of Summoning, and not receiving the 2.7x exp rate for it.