I agree with what's been posted about the uncertainty involved with making species-related changes to the NPC stat blocks. The campaign I'm working on has orcs and various other Humanoid species as both potential adversaries and allies. I haven't decided whether I'm going to convert all of the stat blocks in every situation. For simple encounters like common bandits (which I've already noticed in the flavor text are from various diverse species), I'll probably just use the existing blocks and just add things like Darkvision as needed. For more substantial encounters against prominent foes I'd be more inclined to actually do the full customization bit, for example adding Relentless Endurance and Adrenaline Rush for an orc, adding inherent spellcasting for a tiefling, and so on. I don't see either of those as really being significant enough to warrant adding to the CR, but it possibly could in certain circumstances. I 100% agree that it would be easier if this had been done for me, especially in my VTT of choice, but I don't see it as a major problem either, at least for the species where there are clear rules laid out in the 2024 PH. Doing the ones that they basically chose to skip this time around, like ordinary lizardfolk, will probably require going back to the 2014 MM or MotM.