It would definitely raise compliance levels among the wealthy – though at extremely high cost to your support levels among every kind of (non-priestly) social elite, mercantile as well as noble.
In the swaths of Olde Shayarde where moots were commonplace, everyone in the villages would have farmed. There would have been hardly any full-time craftsfolk outside the (few, and small) cities. People who didn’t have a legal claim to a specific plot would have had a share of common land to cultivate, as well as working on others’ land. Moots would have included them all, though it would often have been the case that better-off landowning yeomen had more power in the moot than their landless sharecropping neighbors did.
As you revive moots, you’ll have the choice of whether you want only propertied free folk to have a decisive voice in their decisions.
That will significantly depend on how much time and how many Theurgic researchers she’s had to dedicate to it… which will depend on the state of anarchy throughout the Hegemony (and especially in Karagon, which you’ll be directly influencing by G3).
Generating a super-wheat that isn’t highly vulnerable to engineered super-blights is a major Theurgic research challenge. A 4-5 INT MC could actively contribute to Phaedra’s efforts… but without a guarantee that Phaedra would use it to prop up a realm whose institutions they’d approve of. There’s no way to hold Phaedra to any conditions you put on your G3/G4 assistance with her research.
Again, we’ll have to see when we get there whether this is really feasible.
Perma-enhancing the weapon-telos of your fists would come at the expense of their other teloi, like holding and crafting. The Hegemony wants its human Plektoi to be able to (among other things) deftly wield superweapons, so it doesn’t try to turn them into One-Punch Man.
And ADAT, @idonotlikeusernames joined the thread for the first time. 
He’s since been not just one of the most prolific posters, but one of the people with the most specific and consistent vision for his primary MC–one that countless other forumgoers have reacted to, and one that’s fed a host of interesting conversations. Thanks, idnlun!
Edit: d’oh! I see I confused the day with the year when I popped this one in the calendar. A Decade Ago on Wednesday, idnlun made his first post. Sorry to be late in recognizing it…
I’ve also taken the liberty of going back and adding a slightly expanded comment for P_Tigras to the second-ever ADAT shout-out on this thread. Seemed wrong to give paragraphs to the other forum regulars and just a name-check to him.