Honestly, the EC has been weird. Some of the language they've used seems super critical of MS, but like the CMA only to a higher degree, they seem far more accepting of behavioral remedies. However, the last things the EC put on the table indicated their impact areas are cloud, console, and subscription services; one of the things the CMA's PF did is they specified that they don't feel subscription services represent a completely new way for consumers to access software, aka its not an entirely independent sub-market of the pre-existing markets they have defined, like console and Cloud.
The issue here is if the EC is still considering subscription services an emerging market they think this deal will competitively impact, that means that they could want a remedy that address that - nothing announced today speaks to that core issue. Getting NVidia on board speaks to the Cloud market concerns both the CMA and the EC outlined in their own ways, but the CMA also specified their concern in the Cloud market goes beyond the participants that are in the market today (Sony/MS/Google (RIP)/Amazon/Nvidia), but also to any potential future entrants into the market, so while the NVidia deal does get them closer on the EC and CMA's concern, it doesn't offer a remedy in offering any new market entrants in cloud.
Finally theres the console market, which seems to be the vector MS wanted to speak to specifically with their points regarding marketshare. The issue here is the one I specifically pointed out: MS cannot simply say "we want to put ATVI's games on MORE platforms" while also saying "There is no way for us to compete against Sony's marketshare lead" - how does this purchase make you more competitive in the console marketshare while you're also doing everything to signal you plan on getting no major exclusivity from this deal? Further, CMA's issue pertaining to the console market specifically speak to the amount of users both they and Sony feel would immediately leave the ecosystem purely if this deal were made and CoD were to somehow go exclusive.
Now, heres the way I look at it: given that Sony had 30m today to explain their position and MS was given 15m (ATVI was also given 15 I believe?), this means that what Brad Smith did in their public display was more than likely more or less what they presented to the regulators today. If thats the case, I doubt the regulators were swayed - these are the same exact arguments MS has been making for 4+ months, at minimum. These were the same arguments they've been making that still led them into these regulatory hurdles, so if these same arguments didn't sway them before, I highly doubt regulators would be swayed now. The fact that MS has tried these last 2 weeks or so to get Sony to the table somehow tells me that MS is fully aware they need to get opposition on board lest the deal gets killed.
Considering MS has been using the public PR angle as their primary pressure tool against their opposition on the deal, I imagine that if MS had curated better terms for Sony, they'd have said so today. In fact, it was MS who has been leaking terms of their deals thus far, so i'm 100% positive if they had created a more 'fair' deal for Sony, they would've shouted it from the rooftops today to add to the public PR pressure campaign. That must mean that a 10-year deal is their ceiling. Not sure if the regulators are gonna bite on that timetable; doesn't seem like the CMA or EC was particularly interested in that before.