So, essentially the company that was hiring (KeepSafe), allowed applicants to submit highly flexible cover letters, and then they actually read the cover letters . It would be great if the majority of companies used both the resume and the cover letter effectively. It feels like most companies that require a cover letter only do so to screen out the laziest 10% who can't be bothered to write up a generic 1 page essay…
I am biased, i think most HR are useless and most tech people aren't great at picking candidates either. they seem to have their own biases that they cant get over (for example: putting too much weight on technical skills and none on soft skills).
honestly, if i were a company i'd send select employees to school. either take classes or better yet teach a class. you'd get a semester long interview process and the employee would get something out of it.