(Sorry for the sort post, but...)
I think TLOU's MP is very fun. The gameplay is really unique as there's a good balance between Stealth and Assault. You can play it how you like, with some tactics harder to learn than other. In regards to One Hit Weapons: The "super powerful" weapons can only be obtained by earning parts (a per-match type of currency used for get armor, weapons, ammo and earned by playing well) or by crafting (similar to the Single Player) them. This keeps the Flamethrowers, Modded Melee Weapons, etc. under control.
There are 3 gamemodes, all of which are free, in Factions. There are two Deathmatch varients (Supply Raid and Survivors) and 1 objective mode (Interrogations). All of them are equally fun, in my opinion. There is no Cooperative gamemode at the moment.
There is currently only one DLC Pack with another pack planned for 2014. You receive 4 Multiplayer Maps (to add to the 7 base maps) for $9.99.
I love it, i can't speak for anyone else though.
Stealth or Shooter, you can play it however you like, playing it like a shooter will probably get you killed fast though, better to stick with team mates and play it smart.
As for the DLC, there is one multiplayer map pack por 10 dlls, a story mode dlc planed for early next year and another multiplayer map pack after that. You can get them all plus customization items for 20 dlls if you buy the season pass.
Great game, i strongly recommend it
Is the MP a stealth game or an OP weapons one-shotting fest? Also which DLC if any should I get for the MP?
It's whichever you prefer, the game can be very stealthy or a guns blazing shootout. Yes, TLOU is an amazing MP game that is very different from most shooters since it is more about tension than action. Yes you should get it, and if you like it enough, the season pass is only $20.
OP best multiplayer in years. Get the season pass, new mp maps coming out in 2mos or so. right now 11 maps including 4 maps last d mp dlc drop, with 4 additional maps next mp dlc drop. Cool perks, cool hats, masks, helmets. You can play stealth wise or aggressive , whatever suits you best. Good luck.