Hmm... I think good judgment is needed when it comes to things like this. By itself, this file encryption wouldn't do much by itself due to its relatively lack of overhead - remember that AES is so fast you'd be still storage bottlenecked at the end of the day if your CPU isn't extremely old, let alone something that meets the specifications, as well as the game's streaming loads shouldn't be outpacing a 5400 RPM drive on an Xbox One anyway.
As for DRM getting in the way of modding, one has to consider that this game was never meant to be modded. If they eventually add mod support, or someone figures out how to mod the game anyway, that's good! Though as itself the game has plenty to offer; a game not being moddable shouldn't deter anyone from purchasing it nor influence purchase decisions too much. Judge a game by its own merits (until the technical or gameplay issues become too much, then that's another case entirely; and in this game's case, neither apply.)
Putting a DRM-enabled label would be a good idea, anyway, if to appease the folks that must know. In the end, as a normal game player, it doesn't really matter to me.
Now, I still have yet to plan for the dough to buy the game. I think I'll wait for the demo first; by then, most of the bugs might have been patched out. Lately I've noticed that more and more games come out of the oven a bit lacking.