There is actually more that these stats apply to than is listed in this description, but its not clearly stated. At least some of them. For example, if you gain Might as you said it is applied to carry weight capacity as the description says. However, it also increases your overall damage output, but doesn't state that anywhere. Other stats likely do more than it says as well, but I haven't been able to discern what it would be exactly.
There are also other skills that are not on the list that get increased like Farming with plots. During pregnancy and afterward with "Motherhood" there are increased stats that are not part of the stat list as well.
I've always deemed "Grace" as the most important attribute to increase for damage output, but at level 20 Grace would be capped if the description is accurate. However, there could be critical resistance embedded in the stats which would make something above level 20 Grace advantageous. Otherwise anything over 20 is waste.
I might just ask discord if there is any info about this because it has been a matter of curiosity for a while now.
It wouldn't surprise me to find out that the stats affect multiple things. I never really thought about it, but it does make sense. I wonder if other skills are just not listed due to the limited display space for where the skills are listed.
I just hope it isn't one of those things where the Dev just wants to have hidden stats in the game, that is always one of those things that annoys the heck out of me in any game.
I just hopped into the game to look at my stats and to remind myself what Grace added (Crit Chance), when I noticed that my stats are not lining up with what I thought how they were boosted.
My character has 17 Might, but when I add up the totals of all the levels of the skills, I only come up with 97, so either there are other skills that are not listed, that are adding to that total or some skills count for more than 1 point per level. So far, my other stats are pretty much in line with what I said about +10 skill levels equaling 1 stat point, but those other skills are in pretty low states, mostly 1-4 for all of them.
If you find anything out, it would interesting to know.