Double bass is no longer exclusive to thrash and death metal (i.e. speed). Now more than ever double bass is being used to play groove oriented metal.
I've been working hard over the last year or two to get my double kick going. I think you have to find the balance. When your new at it (like myself) it's tempting to throw it at everything when having some hi-hat detail would sound cooler. At the same time, there are linear fills and stuff that can't really be matched without the double pedal. Plus the continuous 16th thing which is perfect sometimes and when used in moderation.
The ideal IMO is to get proficient at going back and forth within a song to get the double going when needed but get back on the HH otherwise. I think of Neal Peart this way; great hi-hat stuff, then over to the double bass for fills and sections. Todd Sucherman appears to operate this way too.
BTW, I'm skeptical about the Derek Roddy as a non-double bass guy. I've watched Drumeo lessons of his that are all about fast double bass. I kind of thought that was his specialty.