More keyboard shortcut customization

As a long time LingQ user, i think it would really be beneficial to be able to customize all of the controls to my desired keys in order to improve workflow. If possible it would be nice if mouses with extra buttons was also compatible as well.

As of right now the only way to customize this is to install third party extensions but it would be nice if this was added.

Yes.
If you can customise a mouse, you can use existing shortcuts to do one thing at a time - ah, on the web version.
If you can cope with it threatening to add unwanted words, sentence mode cna show a sentence biglingually with audio on one key press.
A Stream deck can customise buttons and have them in a row; perhaps useful to you.