I think that would fundamentally change the nature of what an EAPC is. Which may be a bit irrelevant now the cat is out of the bag, but anyway...
I think the original idea was for an ordinary bike that was to all intents like a bicycle but had a bit of assistance. 250W / 25km/h are relatively normal figures for an ordinary bike rider. They are human sized figures. So we have a nice way for less fit people to ride bikes in a comparable way to regular cyclists. That was the rather quaint idea behind EAPCs. They are still bikes, but require slightly less effort. And it's fine for them to be used on cycling and shared tracks.
But of course that's not what people want. People want electric motorbikes and light delivery vans (see
this thread) that are completely unregulated. And EAPCs become a kind of Trojan horse for obtaining these.
Now, electric motorbikes and light delivery vans aren't necessary a bad thing. But they don't in any way fit with the original remit for an EAPC: An ordinary bike but with some assistance.
750W continuous rated power is inhuman. Not even elite cyclists put that out for prolonged periods. 20mph is a speed that most normal cyclists only achieve with gravity assistance and only very fit sporty types can maintain continuously on the road.
These might be reasonable limits for a new class of light electric moped (possibly subject to less regulation than ordinary mopeds). But they aren't suitable for EAPCs unless we want to throw away the original idea entirely.
Maybe it was just too quaint and optimistic to think that making bikes a bit more accessible would be a good thing, and not just the thin end of the wedge.