I agree with those saying it sounds a bit scary to stabilize something without hygiene. In particular, the bit about invoking another macro and having to import that as well sounds a bit scary and fragile.
Also will be very good if Rocket can finally join stable!
I suppose macros 1.2 will also do away with the restriction about only allowing a single proc_macro from a crate? (I forget what the exact restriction is, but it was always this weird unergonomic paper cut.)
I upgraded Askama to syn-0.13.0 already last week, was a trivial change, so all good on that front.