I don’t know where are you uploading images. If you are uploading for example for Portfolio, you can open cpt-portfolio.php and other related portfolio template files and make all image sizes to crop to same size (all places where function bfi_thumb is used).
Note that this might break layout and you will probably need to resize image to proper size with CSS.
One more issue occurs in this case and that is when you resize image with CSS they are not looking sharp on some devices.
I don’t recommend doing these changes because because bfi_thumb is optimized and WordPress is doing same thing to decrease page load. You will need to handle all issues arising from doing modifications in code.
Regarding BFI script maintance – script doesn’t have any bugs but author decided to fork it because they think some functions are not necessary any more.