You & the forum regulars know my preferences well, yet here's where I ante in. I love the bars, not just for utility either. They also look great as does the speedo. Early road bikes had large headlamps and speedo too. As to rear racks they were common in early days and have continued to this day. If you were creating a perfect replica board bike then minimalist is quite correct, for a period road rider anything goes, mix and match to hearts content with period style touches.
Many originals display combinations of race look with practical daily use accoutrements like headlamp, bars, rack etc mixed with Messinger board track saddle, fenderless fork or sans fenders period, small tanks... Racing influenced the sales of brands which won and, like today, many purchased various accessories used on or which were ommited on factory race bikes. We've observed the post war "Bobber" bikes thrive in various forms for decades now. I'd suggest there was no correct way to accessorize a bike from the factory or customize by the owner. In the "spirit of" continues and greatly enhances ones liberty to build and enjoy the results. Self expression was and is fundamental to those who fabricate one offs, if not just buy a cookie cutter bike from whoever and slap a motor in her.
I like your Ace...
Rick C.