It made sense to me, as I pretty much move to the Lee standard and wide angle hood for everything I shoot, Canon, Nikon, Fuji, Phase One.
The one issue, is a CLPL. If you use the wide angle adapter rings these fit over the outside of the outer diameter of the lens, so if you have a CLPL on before you mount the Lee wide angle adapter ring, you will not most likely be able to get off as it will just spin due to the CLPL ring. There is also no way to get a grip on the polarizer. Just a heads up. Lee should make a better note for this.
Two options that I know of.
Use the Lee CLPL in one of your slots, works great if you don't have a hood on, works OK if you have a Lee hood as you may end up rotating the hood to where it vignettes to allow for the max polarization.
If you use the hood like I do, then on the Wide angle hood you can attach a ring on the front that allows for a 105mm CLPL. You can access the polarizer from the front of the hood.
Most of my lenses need either 72mm, 77mm or 86mm. And those that don't you can always use a step ring. No problems with the wide angle adapter rings with step up rings as everything unscrews the same way.
Paul Caldwell