Watched the whole video. Early on it seemed like you were spending too much time aiming at people outside of the optimal range but as the match went on not so much - not trying to insult your play because you did very well and it is like you said how you play. A few things I disagree with that you brought up,

Investing a lot of points into the laser rifle. You made it sound like you need to use a Viziam with high proficiency and a couple complex damage mods in able to wreck with the laser rifle, but honestly that is not the case. For the longest time in Uprising I used a simple standard laser rifle with no mods at all and was really efficient at it. Now I use an ELM with no proficiency and a single enhanced damage mod (I run advanced suits in pub matches) and feel godly on the battlefield. But seriously, just through 12k skill points or however much it costs to get Operations 1 and you can tear apart anyone, even protos. Throwing more SP at it makes it a bit easier, but the its more about understanding the weapon than it is investing points.

Secondly, you said it is only really good for Domination. That's cool, your opinion, but in my opinion it is best in Ambush, then Skirmish, and lastly Domination but overall good in all three. I say it's the best at Ambush because most the time what happens in Ambush is you get two big blops of guys shooting at each other across a no-mans-land, which is perfect to take advantage of the laser rifle. Then I say Skirmish as second because there are multiple objectives so it won't be much of an issue for your team to control at least one, then like you said play some defense and don't let anyone get close. It can also be good in Skirmish if you are following an attacking squad a good distance behind and playing support. And finally I say Domination not so much because it is ineffective, because it's not as your video clearly proved, but because I am always trying to win even in pub matches and in Domination you really need to be swarming the single objective. If you sit out and play perimeter while the enemy has the objective then it is the equivalence of the enemy holding all the objectives in Skirmish and you're hiding somewhere in your redline sniping - yeah you may get a lot of kills but you aren't helping your team make a real push for the objective. Of course if you already have the objective then by all means start lasering everyone who gets close.

Just my two cents. Glad to see a video showing the laser rifle working effectively.

I also enjoy the laser rifle and went 10/0 with it last night.

The LR is a psychological weapon, when people see the beam sweeping around a certain area they tend to stay away. As stated above in an earlier post, it is a great area denial weapon and I use it as such. If you're rushing in on the front lines with the LR, you're doing it wrong.