Would desoldering the sockets help?
Why are the sockets bad?
This sort-of-interview of Nirav Patel (ceo of framework) explains in a bit more detail: https://www.youtube.com/watch?v=-lErGZZgUbY
Basically, they need to use LPDDR5X memory, which isn't available in socketed form, because of signal integrity reasons.
Which means you won't see an improvement if you solder your ram directly, I think mostly because your home soldering job will suffer signal integrity issues, but also because your RAM isn't LPCAMM and isn't spread across a 256 bit bus.
Like physics PhD-level more.
This is also the reasoning why you can't just have a dumb female to female HDMI coupling and expect video to work. All of such devices are active and read the stream on the input and relay them on the output.
Above certain frequencies, you start running into major issues with signal integrity, and fixing them is very difficult without any extra circuitry.