I've taken it one step further, and - along with the planeswalkers who make bodies for either zero or positive loyalty - I'm also cutting planeswalkers whose jobs are mainly to prolong the game.
Gideon Jura is the prime example of that, but
Jace, Architect of Thought is another guilty party, and I'm lumping
Kiora, the Crashing Wave into that category too. To be fair, the latter two can be fun in some scenarios, and aren't oppressive towards most opponents, but they almost always serve to draw out games much longer than any four drop reasonably should.
I'm kind of down on planeswalkers, as a whole, and am at my lowest historical planeswalker count at the moment. Not sure if it's just 'planeswalker fatigue', after years of cubing with them, but I'm finding I haven't missed any of the powerful ones that I've cut. Never thought I would become a grumpy ol' curmudgeon, but I find myself siding more and more with the folks on this board that hate everything about planeswalkers since they were first introduced. My position isn't quite as extreme, but it's mostly that, since reducing the total number of planeswalkers, I find that good stuff midrange has taken the biggest hit, while dedicated control decks have received a boost - a slightly unexpected but perhaps not too surprising result, since tap-out decks with lots of four and five drops are where walkers do their best work. Anything to nerf midrange!