Place de Remy was designed from scratch for Disney Studios Paris. It's the Pixar version of Paris as depicted in its own self contained courtyard.
France at EPCOT is supposed to take a more authentic, though still romanticized approach.
Disney tried to recycle as much as they could of the WDSP exterior, while also looking to cut corners on new additions [painted flats] and it just doesn't fit with the existing pavilion. Yes, it's all "French", but that doesn't mean any French inspired design will work. Material, shape and colour all matter and they really could (and should) have done better.
I'd wager that anyone who has seen Place de Remy at WDSP in person will likely not be as impressed with the Epcot version. I could be totally wrong, though. I am looking forward to seeing the finished product in person, but when I'll be able to do that is anyone's guess right now.