Both Bungie and 343 have been trying to expand the playerbase and make the game mechanics more approachable. That's the line of thinking. Call it a lie if you wish, but it makes sense.
People don't start off as good players. And if newbies get slapped around silly for enough matches they stop playing and the playerbase dwindles. So you need to come up with systems that enable a solid skill curve, but are far more approachable and tolerant of beginner mistakes.
So you're seeing faster gameplay with shorter kill times and more power weapons on the field based upon scores rather than classic map control. This allows new players to get more kills under their belt, and aid the team, without them knowing the map or even the ins-and-outs of AAs and power weapons. This is why we have Regicide scoring the way it is. Its all in service of those design goals.