I’ve just read your review which is fine except I do have an issue with your comments about “Overhead”.
The entire Foundation CSS grid is only 24kb in size (and 17kb) minified. I don’t understand why you refer to this as a huge overhead. Similarly the entire Bootstrap grid is only 26kb.
Both Bootstrap and Foundation grids provide the complete functionality for columns, visibilities, media queries and advanced layouts such as source ordering and column push/pull.
I am in now way commenting on this stack which I am sure is a fine product but I do feel that there are a lot of misconceptions about frameworks in the RapidWeaver community.
I have been developing framework based sites for many years both with off the shelf ones and self authored ones and while they are not applicable in every case they are certainly not bulky or “overhead hungry” solutions. In my short time using Rapidweaver I have compared the volumes of CSS and JS for themes with frameworks and not surprisingly they are roughly comparable with like for like functionality. In fact many of the themes use either Foundation, Bootstrap or UIKit anyway it is just that users don’t seem to realize it.
Thats it, I’ve got it off my chest now, I hope that you do not take offence, I only mention it for general informative purposes and as I say in no way am I comparing any of these statements to this stack which looks highly functional and a great addition to the stacks compliment.