There is no issue to run into. The clarification by Blizzard is not only newer lore (and newer lore trumps older lore), but is Word of God, the highest level of canon. What we're running into is some people being incapable of dealing with canon when it's inconvenient to them for some inane reason.
Source for Helya being a minion of the Old Gods. And what famous line during the undead starting area? Sylvanas doesn't even personally appear in Tirisfal, let alone Deathknell. If you are referring to her dialogue with Garrosh in Silverpine, her sarcastically talking shit to Garrosh isn't the grand argument you anti-Sylvanas people want it to be, so stop desperately clinging to it. Even Garrosh realized it for what it is for and called her out on her clever mouth god's sake. And he wasn't exactly the brightest specimen of the Orc species. Imagine what it says about you lot.
New Forsaken were being resurrected even before Cata, just on lower scale. And they need to replenish their numbers somehow, that's the primary point of the resurrection..
Except that homeless shelter was hell-bent on destroying their enemies from the get go. And majority of new Forsaken that we know of came from old graves.
Except she isn't forcing anyone. Great reading comprehension right here. You totally grasped what Aucald said. And that kind home you try to conjure up here was always Sylvanas' army first and foremost. And either way, you can't keep building a home forever. By the time Lich King died the home of Forsaken was built and rock solid. At some point you need to shift your focus towards preserving that home. Which Sylvanas did. And which, in case of Azeroth that suffers from a world-ending threat every year, with an occasional world-wide faction war started by the Alliance every now and then on top of that, requires manpower. Which Sylvanas provided.
Yeah, because Sylvanas wanted to be threatened before Lich King died. That's why she developed a superweapon and spent significant manpower to obliterate threats around Forsaken territory. And Forsaken still have always been an army.