We don't know if it's just a temporary change or a permanent change -- looks like a permanent structural change(EQMs on all flights + minimum AS segment), but the EQM requirement stays low for at least 2021. I would imagine the EQM will go higher post-COVID.
Due to the low earning rate for partner Y flights & the minimum AS segment requirement I doubt it would attract people who mainly fly partners. However, it does make AS the easiest program to earn OWE so I do see some people switching to get that. It could lead to more people flying AS metal, which is exactly what AS wants.