No. The only orbit "wildly elliptical" is that of Pluto. The eccentricities of the other worlds are extremely small. While those orbits are not quite circular, they are not "wildly elliptical" either -- and one can do back-of-the-envelope calulations on those orbits and arrive at a ball-park figure by assuming they are circular.
No. The only orbit "wildly elliptical" is that of Pluto. All the orbits are elliptical as radio astronomer's post shows. As to how "wild" they are is pure semantics, sort of like the meaning of 'alone' (in a room, in a building, in a city, in a country, on earth, in the universe). I will not waste my time with such hair-splitting.