The vaccines are essentially unchanged since their formulation as early as March. Everything since then has been testing, not creation or modification (only some experimentation with respect to dosing).
You want "rushed"? Get a flu shot.
So my question is what evidence do we have that corners have been cut? Are you basing all of this only on the reduced time to produce the vaccine?
I encourage people to research this more deeply i.e.
https://www.nytimes.com/interactive/2020/04/30/opinion/coron...
To my understanding the things that are being fast tracked are all the bureaucratic red tape and but covering stuff.
Not the actual science.
If any of the science was rushed we could have had the vaccines as early as this summer.
But a phase 3 human trail takes 8 months. There is just absolutely no way to rush that part as constructed