I can't really say the prospect of the Ratatouille ride excites me at all. It'd be understandable from a logistics point of view, having to spread the lines out from the other side where Frozen is, but the ride as it is in Paris doesn't do a lot for me.
A point was brought up previously that I think raised an interesting issue; while I think it's completely reasonable to want less IPs in EPCOT so that it can retain its more unique characteristics and be a bit of a reprieve from what can, at times, feel like an endless barrage of advertising and merchandise for Disney films and properties around the parks, the point goes deeper: if you're going to design a themed land, and within that themed land create pavilions, then you really want those pavilions to flow well and be a cohesive experience. A ride like Ratatouille, in my opinion, would feel a bit like a distraction for me from the flow of the existing pavilion.
That's not because Ratatouille is a bad ride, per se; it's not bad at all. But while the ride at least takes place in Paris and highlights French cuisine, it's still the type of ride where the property itself would take precedent over the pavilion and the culture behind it. There'd be space opened up to sell Remy plushies, t-shirts, etc., which I fear would kind of come to dominate the overall experience of the France pavilion, leading to less emphasis on cohesion and flow.
There's a great line that gets used in the incredibly not-safe-for-work reviews of the Star Wars prequels by the guys at Red Letter Media (if you haven't seen them, they're incredibly vulgar, but incredibly funny, and will eat up hours of your day) - they mention that often in filmmaking there will be small, minute details that a good filmmaker doesn't neglect. The line basically says "You may not have noticed it...but your brain did." That's the type of thinking I feel is missing from EPCOT these days; you can put in a new attraction, that's great, but the attraction really should serve the purposes of the themed area/pavilion it's a part of, and not minimize what's around it, instead. Maybe they'd handle Ratatouille well, I'm not trying to completely pooh-pooh the idea, but it feels a bit too much like a 5 minute ride that doesn't make me say "Man, I want to experience Paris right now" so much as "It's fun to see Remy and friends", which is the style of ride that EPCOT should probably avoid if it wishes to work in a more cohesive fashion.