Let me start by saying something we can all agree on: the kill times in games like Call of Duty and Battlefield are way too fast. The winner of the battle will almost certainly be the person who took the first shot. But Halo Reach (and even Halo 3) may have gone overboard with making the kill times longer. For Halo 4 to truly meet its potential, it’ll need to find a balance between instant kills and the painfully slow kill times of Halo Reach. Doing this will please casual gamers, competitive gamers, and will simply make Halo more fun.
From a casual standpoint, there is nothing more frustrating than shooting at someone for five seconds only for them to waltz around the nearest corner and lob a grenade to ensure you don’t follow them. Even if you can get 5 shot kills every single time, your opponent will likely be able to get away astonishingly easily. This makes the game frustrating, not to mention flat out boring.
From a competitive player’s point of view, long kill times are detrimental to the game’s complex strategic elements. In Halos 1 and 2, players had to spread out across the map and develop a set-up that could deal with enemies attacking with a huge variety of their own strategies. In Reach, people simply held hands the entire time. The best “strategy” in that game was by far just staying within a few feet of your teammates. Competitive gameplay is incredibly boring when everyone is constantly using the same simple tactic over and over and over again.
Furthermore, quick kill times would lead to more multi-kills. With the default settings of H3 and Reach, it was nearly impossible to get past a triple kill without a power weapon or vehicle. Say what you will, but deep down you know how exciting multi-kills can be.
There are many different approaches that 343 can take to fix this problem. They could make bloom reset faster (which would obviously make kill times faster) and create more open maps. With open maps, people wouldn’t be able to run away as easily, and if they did, they would be more likely to run into the line of site of one of your teammates who would be happy to finish the kill. According to Killa KC (MLG guy), 343 has made bloom reset faster, and from what I can deduce from gameplay footage and screenshots, the maps do seem to be more open. Those two things right there may be enough to fix this issue. However, I’m willing to take it a step further. I think that, in addition to the changes they’ve already made, 343 should make the DMR and BR 4 shot kill weapons, the magnum a 5SK weapon, and then give the necessary buffs to the AR, PP, etc.
Please leave some feedback on this idea. I’m interested to know if anyone has a reason why slightly faster kill times would be a bad thing for Halo 4. As a final note, I’d just like to say that I love you 343, and I can’t wait for Halo 4 
EDIT #1: Average kill times are fine where they are. What Halo 4 needs is a really fast minimum kill time (around 1 second flat) and an average kill time of about 2 seconds. Assuming Halo 4 doesn’t dramatically drop aim-assist, it looks like the min kill time will be around 1.8 and the avg. kill time will be right around 2 flat.
What 343 should do is make the guns more powerful, but also more difficult to use.