By my count, that's 6 brigades. Unless things have changed a lot, that's two full divisions. Will there be two Stryker divisions, or will the brigades be distributed to existing divisions? If the latter, that would sure bite - replacing a tank brigade (2 Battalions of Tanks, 1 of Mech Infantry), a Mech Brigade (2 Battalions of Mech, 1 of Tanks), or, even worse, the division's "balanced" brigade (2 of each, Tank & Mech) with cute little wheelie Stryker things
If it's good for Stryker units, why not equip the normal infantry unit with all the goodies? Stack the deck enough and I can make a "leg" light infantry unit capable of defeating heavy armor!