I have no direct, hands-on experience with Dark Lord dials, but if the OEM printing is removed from a gen dial, then, according to Rolex (they make the rules), it is no longer a gen dial, at least for the purposes of resale or provenance, regardless of how well the aftermarket printing may be. So I would have no problem removing the dial feet if that makes it easier to complete a project with a credible-looking dial.
In my experience, Phong's cases are variable, sometimes gen parts fit, sometimes not. That said, if you are competent with a dremel, you can usually (not always) make something fit.
On the other hand, I have never had any problem with MQ's cases--they accept any gen part that fits a gen case. And that is the beauty of the better aftermarket cases--they are generally perfect clones of the gen, so assembling a franken out of 100% gen parts is a no-brainer. The problem (with gen/clone aftermarket cases) arises if you want to substitute aftermarket/rep parts for gens. Say you have an MQ dial & case & you want to use an ETA movement. You have a problem, because the dial feet do not fit the movement & must be removed/replaced with dial dots (unless you want to disassemble the movement, drill the appropriate holes in the pillar plate & hope none of the dial feet contact any of the moving parts).
Also, if you use a gen movement, gen hands fit as well. No modding required. But, of course, the trade-off is finding the gen movement & hands. Although difficult & definitely costly, if you have patience & determination, they can be had. You just have to decide whether your goal is a good-looking, reasonably priced mostly aftermarket franken, or a mostly gen cost no object long-term project.