[Constriction and "choking" can also be a protective reflex. If the body detects that the pressure or airflow at the throat is unhealthy, it says, "forget the singing" and reflexes to shut off the problem. Just like your "blink" reflex, it is not a good idea to try to simply override it psychologically. You need to address the thing that is causing the reflex. For singing this is likely to be something like inadequate breath support.]
Anyway, back to the OP. Decent vocals, imo.
With proper diaphragmatic breath support, your voice will glide effortlessly straight over the passaggio, and you will get that responsiveness and agility you are looking for. I notice in classical training techniques that they make a big deal out of breath support (probably coming from traditions of singing without a mic), and relatively less of a deal about the passaggio (even though the term comes out of that pedagogy). Once you are able to employ a good diaphragmatic breath support method, .like appoggio, the passaggio is no longer a big challenge. It gets "fixed" almost automatically.
Add that to the fact that you are able to siren up to G5 (wobbly, but an impressive foundation), I think you can really take your vocals places.
Yup, I am not a coach. Just my personal take.