Not an expert in Cosmere/Connection stuff by any means, but something in RoW sparked curiosity:
In my opinion, Adolin is personally suited to Stonewards (team dynamics, being there for those who need them) and not so much Edgedancers (being there for the common folk). If Maya did not exist, he may have attracted a peakspren already? Also, I was just reading RoW for the second time and stumbled upon these 3 Adolin thoughts italicized in Chapter 35 as he fought the Tukari off with Maya alongside him, and Brandon's italicizing seems suspicious to me:
1. Never underestimate the strength of a soldier trained to stand fast.
2. Never underestimate the simple intimidating force of a man who won't back down.
3. Never underestimate the worth of being willing to hold. Your. GROUND.
Do these sound suspiciously like Oaths? I have noticed Brandon previously italicizing Oaths. Especially the first one which sounds very similar to what Coppermind thinks will be a Stoneward second Ideal!
Has Adolin already sworn his Stoneward Ideals, but no peakspren around obviously, but do you think Maya somehow accepted these (they can sense each other's thoughts/feelings) and
What decided that cultuvationspren would be Edgedancer spren and peakspren be Stoneward spren? Could Maya and Adolin be making a cultivationspren Stoneward???