Honestly think this acquisition would play into Microsoft's current angle perfectly.
Microsoft under Satya Nadella doesn't care about being the market leaders or "winning the console war", they just want their software and services running on as many platforms and pieces of hardware as physically possible. See the acquisition of Havok and Minecraft as examples of this. Having the leading 3D physics used by developers under your wing, ready to be leased out to multiple studios working on a variety of platforms. Minecraft, one of the biggest games of the last decade, running on multiple platforms and even requiring Xbox Live services on those that will allow it. This is MS' new bread and butter.
Now imagining MS acquiring EA and looking beyond the absurd thoughts of making FIFA and Madden exclusive, this will give Microsoft multiple yearly franchises that are released across nearly every gaming platform. They'll acquire the Frostbite Engine, which they can then offer to devs to use on their games, rather than being locked to just EA titles. They'll acquire all of EA's studios to give their own franchises and begin to make new IPs at a much faster rate. This totally fits into MS' current MO.
That said, I don't think it'll happen (see the discussion on this topic in Easy Allies latest podcast where they talk about the logistics of said takeover), but I would love to see it happen, just to see how everything would shake out. Day One FIFA/Madden/Battlefront/NFS on Gamepass? Phil's "Netflix for Games" dream would finally come into view.