As a MVPless pleb and someone who plays Melee and DB RK excessively, I'm kinda happy physical builds are getting the Nightmare Bio hat this year because DB builds are getting ever more "noob" friendly with the stuff that has been coming out, Heartwing in 2016 which (for most) will give 15% aftercast reduction and now these New Wave Sunglasses, make DB waaaaaaaaaaay more spammable and seeing that equipping both with high tier gear (-MVP/Gods) ended up around the same to me, it was quite dumb how much stronger and reliable the dragon spammer is.
I guess what I'm trying to say is that, with how good aftercast gear is getting, Physical NEEDS this hat more than ever, because it's one niche of being "The easier RK to solo without MVPs" is dying off IMO.
On the subject of future gear for DBs, Excellion Suit combo (Garb and Armor) will give you (assuming you have all the enchants for HP on them and the armor is +12) will give you a total of 46% more HP and 20% aftercast delay gears. Little ol' me is currently sitting at 55%, and losing garb and armor slot is kinda irrelevant when you're getting so much more HP and making DB that much more spammable. It makes even Heartwing, which is admitely expensive as heck, a non-necessity for more budget people.
Future for both RK builds is bright, I guess the Imuke Shield was a huge middle finger for WOE people, but PVM/MVP will only get better and more smooth.