Could have been both.
Could have been some management folks at WotC who didn't like the OGL and thought it was a bad idea, but their pushing for it wasn't getting very far because most of WotC supported the OGL because they had experience of what D&D was like before/without it and the entire 4e debacle, until the idea of eliminating the OGL caught on with upper Hasbro management and it became something the C-suite execs were wanting to happen.
My take is that "Brink says that the OGL change has been years in the making and comes from a time before Hasbro paid much attention to WotC or D&D" (more of a reply to
Retreater): well sure, that could go all the way back to 4e, and some of the people responsible for the Game System License. This could be the remnant of that contingent trying again, and incorporating what they believe they learned from the first time.
Either way, it was Alta Fox Capital that brought attention to Wizards and forced some changes, possibly including the promotion of Chris Cocks from Wizards to Hasbro. Even though, we do not know how much Hasbro is involved, outside of high-level hires like Cynthia Williams and perhaps approving high-level strategy and direction to meet Habro goals. In general, when a corporation wants to put a subsidiary on a leash, they place someone from the corporation in the CEO or COO role, not hire outsiders. Though who they hire from external can tip their hands on direction and goals.
Both is exactly what the small publishers are saying. High-level direction, e.g.,
we need to better monetize this brand" (paraphrasing), and someone lower-down with enough clout push their weight around and tried to make a name for themself.
Lastly, we have to think about the demands (er...terms of 1.1 and 1.2) and then think about which departments within WotC benefit from each or have a stake in each. The VTT team clearly as 1.1 clearly targeted the competition, legal as licensing and royalties is one of the few ways for a legal team to magically become a profit center, the business side the publishing operation seemed to have a stake, and yeah, someone had it out for Paizo and wanted to build a moat against another Pathfinder—so publishing business side print and digital.
Publishing is not all creatives, if you think of old-school magazines, there were always two camps within those organizations, those on the editorial side of the house (here the creatives) and those on the publisher side (the business, including the circulation, ad sales, etc.). D&D is a publishing operation mostly, there is a business side, that is Dan Rawson, though we are told Dan is liked and not part of it. And this is where I start to have doubts. For something this big, the Senior Vice President of Dungeons & Dragons should have been in the know—that is the correct level to be in the know as it affects the business, and directly ties to overall strategy and direction. Not saying Dan would be hands-on, but not knowing seems a stretch, and who on Dan's team had the ball or failed to report this plan up the chain?