We do 300 point games as that's the organized play standard and they work fine there with or without sustained attack. If used at different point levels, your mileage may differ I guess.
I think we've covered this before. The lasers are great as a second unit to back up your front line units. Against lvl 3 infantry, BBQ boys, and light vehicles these guys rock. Against standard lvl 2 infantry swarms and medium walkers they stink.
They work fine but I do agree that the statistics favor the phasers just a bit over the lasers. It would different if you could force a reroll on an opponent but you can't and that makes the phasers extras good because there is no reliable defense against them other than their crap range.
Also so far the axis flyer doesn't seem to have lasers, just machine guns and some underwing hardware.