wrt to Form Follows Function, it doesn't mean that you have to compromise on making it pretty, it just means you first focus on getting the functionality correct. Great form and great function do not need to be mutually exclusive.
HDS has a utilitarian design philosophy which has attracted many customers and is apparently making money from it. I may be wrong here but Tinderbox may be suggesting that HDS ask themselves, that given the great functionality that they already have, how can they now package this great functionality into a better looking package and still maintain the great customer base they already have while attracting new customers.
btw, I think the functionality of the HDS is great and it looks great.
And with the newer tailcap with the knurling and indent for the tail button for solid tail standing is a step forward to making it more functional and beautiful. And Arc style clip and titanium bezel rings are also nice.