3 tiers.
The North Stand will just be the same as it is now, but with an additional tier. There will be no change at that end of the ground bar an increased capacity. Do we relly want that? The atmosphere won't improve. And the empty seats on Level 1 will remain and still be an issue.(unlike South Stand level 1)
The Family Stand is pretty diluted now with Adults. Gone are the days when you had to have a child to get a seat there. The Family stand or North Stand level 1 is pretty much open to anyone now.
The club won't put the family stand in level 2. They are the most expensive seats out of a proposed 3 tiered stand. Just like they are in the South Stand.
The whole point of increasing capacity, as well as improving the atmosphere, which is more important, is creating a proper home end for City fans. Making the North Stand a 3 tiered stand like the South Stand won't achieve that bar increasing the capacity. The only feasible options are creating a single tier stand or an enlarged double tiered stand with rail seating on level 1, and a good mixture of young and old fans on level 2 who will join in with the singing on level 1 below. Forget about a 3 tiered North Stand. It won't work or improve the atmosphere at the Etihad.
Back to the single tier discussion in a bit.