My bad. 3 rows of how many? 2 rows of how many?

Compared to the 7M8 which is what... 1/4 or 1/3 of the cabin?

This policy works on UA because they have something like 1/3, minimum, on every aircraft. And it's only pretty recently that they started selling "Economy+ fares" (in the context of this discussion, similar to AC's Comfort or Latitude fares).

My issue isn't "lesser Elites shouldn't get free Preferred Seats", it's "AC doesn't have enough Preferred Seats for this". It's a zero-sum game. Giving them earlier to lower tiers means a later-buying higher-tier just can't get one. Or a last-minute CO/LT fare can no longer get what they're paying for.