At my last service they replaced the front rotors/brake pads on my 300 free of charge part of a recall because the 300 GX had squeaky brakes. I personally only got the squeak a few times but the earlier ones had it really bad. The complaints first happened 2 years ago.I would assume that design and development is a ongoing continuous process and that they are already working on the LCI and next generations.
I am sure this is one of many parts they change all the time or improve upon all the time...the true Toyota kaizen way.
A 2024 300 will no doubt be a better vehicle than a 2022 300.
The LC300 had alot of annoying first year (and even 2nd year) issues. Lots of engine failure issues as well in the early batches. I see the same happening with the Tundra in the US.
The new engine has a bad reputation now here but in a few years they will all forget about these issues because no doubt Toyota will continously improve things and the early issues will hopefully be a thing of the past.