Such reports are a snapshot of one moment in time.
Firmware updates can vary from problem solving to
problem creating, from beneficial to nightmare. You
don't even know in advance which firmware is your
camera body nor your adapter until you unpack the
items. And acoarst you don't know in advance what
the result of any particular update will bring.
Your mention of a 10 day window is unsettling. The
only semi-secure approach involves NOT parting
with the Canon outfit until all the bugs are worked
out of the new hybrid outfit. And since that is, again,
a snapshot in time I've called it "semi-secure" since
the only fully secure approach is to never part with
the Canons, maintaining two systems and enjoying
whatever functional crossovers work for you, but
not depending soley on a hybridized outfit.
You don't need to wait for hoped-for rapid replies
about YOUR specific lenses. Acoarst any timely
replies will have value. But of equal or greater value
are the discussions already occurred that you can
research within this forum. When you read those
you will grasp the general idea, and the level of risk,
and realize that a 10 day "do-or-die" option is not
anything you should act upon if it involves parting
with the foundations of the Canon outfit.
Maybe you haven't heard, cuz you are new here,
that Sony has serious compatibility problems with
its own stuff, alpha E-mount to alpha E-mount, lens
to body problems. Again you can research that in
this forum. Add that info to the mix, then see if you
still feel secure in relying upon a Metabones-Sony-
Canon 3-way hybrid outfit dependent on firmware
from 3 independent unrelated sources.
Anywho, welcome to the forum ! And, just in case
you disappear 10 days later, best wishes and happy
trails to you !
Some general advice here: