So a card that encourages you to play a bunch of them feels like a step in the wrong direction. Maybe I'm off base here though.
No, I'm with you completely. "Counting planeswalkers" seems like a lame mechanic, as is encouraging players to build their decks towards all-out planeswalker wars. It sounds good in theory, and might be fun the first couple of times, but after the umpteenth board in standard gets clogged up by high-loyalty walkers on both sides with no way to interact with each other, I think it'll get old. These days I'm convinced that planeswalkers are the main source of no-synergy, all-goodstuff midrange decks.
Also, when you have multiple planeswalkers out, it's really hard to not already be winning. This feels like the ultimate win-more mechanic.