Everyone seems to forget the only armor ability that actually did what it was suppose to (drop shield) but no one ever used it myself included.
The problem with AL was that players found a way to spam it causing them to regain shields quicker (for some reason) there were also the players who would run into a enemy and go into AL right next to them some how causing damage, AL users exploited this and would hit there opponent twice with this and then melee them.
The jet pack broke gameplay because of the map flow and the fact that people used it to camp.
AC was given two weakness the radar jammer and the fade when moving.
With the two evade bursts a player could move acrosss a small map too quickly.
Reach's sprint was to clunky I've heard thats been fixed.
Hologram didn't cause much of a distraction I've heard this hasn't changed much.
The AA's in reach were pretty bad and thats why people don't like them but we have to give the new ones a chance.
PV, HLS, and thruster pack seem like good additions that won't subtract from the gameplay.