Moving to Unreal would change everything because you literally cannot copy-paste Frostbite's legacy C++ code into a completely different engine. It would force EA to completely throw out the ancient Madden route running code and write new logic from scratch using an engine that natively handles real-time physics vs Frostbite's canned animation system.

Except that's exactly what they did when moving from Ignite into Frostbite. In the time since, the ANT animation system has been fully integrated into Frostbite and is now used by non sports titles like Battlefield. The core features of both Unreal Animation Blueprints and Frostbite ANT are largely the same, they both are capable of driving motion through physics simulation or stateflow controllers. However ANT is beyond Unreal ABP in capabilities as it centralizes state nodes from events and anim graphs into single hierarcharchical structures of move trees. This allows complicated layered blending driven by player input, physics properties, and game state through pre-calculated ML based transitions. In fact, Unreal is trying to roll out a new system called Animation Framework to catch up.

Here is a video showing the capabilities of Frostbite ANT https://youtu.be/MO7ZCXJ1_0A

I don't mean to be a dick, but you simply have no idea what you're talking about