I don’t see the connection between the Unstable Power blessing and “new toy syndrome.” But also, the new two-handed power sword mechanic sounds like it’s meant to limit usage, not empower it:
Probably a safe bet that they’ll have an Unstable Power-like blessing though. Remains to be seen if it’ll be worth taking.
Yes, all the time? I don’t find the Illisi terribly powerful when it’s not activated.