Only problem with laser is there is no needler-based Covenant equivalent.
...sorry.
Anyway, if the laser is unchanged from Halo 3 then perhaps other aspects of it were changed instead, such as availability on maps and whatnot. So many things about the sandbox are being modified that perhaps the laser just doesn't need to be changed. There seem to be a lot of vehicle countermeasures being added but that doesn't mean there will be rockets and lasers on every map. Either way, the community has no evidence whatsoever that Reach's laser is going to be the exact same game-breaker as it was in Halo 3 (which I kinda disagree with). All we know is that it wasn't changed. Everything else, however, seems to have been changed... which means judging the laser (or anything in Reach, really) is futile and pointless at this time.
So just wait until the beta. If the laser breaks it, then we can bitch about it. Bungie will modify it as they deem fit, and Halo: Reach will be a better product as a result of it (after all, thats the whole point of this whole thing, right? If they didn't care about balancing the game, there wouldn't even be a beta in the first place).
There is no reason to get royally pissed off about one weapon in the game before we even see how its utilized in the sandbox. How about we talk about jetpacks?
jetpacks rule