Methinks we shouldn't put to much stock into the decisions made in the famously popular and long lived Halo 2 Vista port.... Imagine thinking the BR and DMR are too accurate for mouse input, but thinking the best solution is to make sure respawning players can't possibly fight back against precision weapons, let alone sniper rifles.
In the CTF games that I played, enemy players didn't spawn within my sightlines. If nobody starts with the DMR, spawnkilling won't be an issue. If the enemy has a sniper rifle and you spawn right in his face, you're going to die regardless of what gun you have equipped on spawn.
There are at least two DMRs on the map at any point, on each side. Both teams have equal chances of acquiring a precision weapon, making those spots contested areas, and once those areas are secured by one of the teams, they can move in and take the flag or plant the bomb. The enemy team can, in turn, take back the contested areas because, again, not everyone spawned with a precision weapon that's capable of cross-mapping, so if they make a coordinated push they can kill the few DMR users and take the guns for themselves. To reiterate, even if the enemy team has both spawns of the DMR and Sniper, that's still only 4 players out of 8, instead of all of them. Your team may still very well be capable of winning the game with the help of vehicles and coordination, something that simply doesn't exist when everyones first thought when they spawn right now is "where is enemy". Why should they care about teamwork and coordination when they already have a powerweapon equipped and ready to murder from across the map? Besides, the Magnum is still a very decent precision weapon. I've killed multiple DMR users at significant ranges with a Magnum in invasion
, where bloom is maxed. Surely people can find a way to use the 85% less bloomed Magnum in BTB?
Vehicles finally have a use again, the weapon sandbox finally has a use again, Halo's core gameplay is restored. Pop pop matches from across the map can be done in Team Hardcore. Let people who don't have laser aim have a bit of fun in team based gamemodes too.
For the record: Never played on console, just on CE and 2 PC. I have no problem aiming with the DMR and can do just fine in all gamemodes. This isn't a "waaah dmr too strong" issue, it's an issue that plagues the game with repetitivity and, ultimately, staleness. A varied, chaotic game makes for a much more entertaining experience.
Maybe this was alright on the 360 at 60fps and lower resolution, but on PC at a very reasonable minimum of 60fps 1080p where you can see the pinky finger of an enemy 100 meters away from you if you zoom in with your DMR, no. It ain't okay my dude. (sorry if this post comes across as confrontational, all I want is for the game to be better and I have no intention of insulting opposing opinions)