As of right now. I have a level 28 marauder and a level 26 sorcerer. At this point in the game, most of the time people are running one scenario, Tor Anroc, over and over and over and over until they hit 32, with questing done in between scenario pops. This is the same thing that happened in Tier 1, usually Nordenwatch and Tier 2 Mourkain Temple. It's like running Alterac Valley over and over and over to level. The major difference here is it takes even less brains. It all comes down to numbers of healers and AoE dps.
In a scenarios here, most of the time the team that is the first one to the objective on the map is the one to win it. Another way to look at it is, the first team to start dominating, dominates the scenario. It is possible to come back, if the flag carrier or whatever really really messes up, usually by not paying attention to where he is at, or if one team is really short on healers, (or just has boneheads for healers). As you continue to play Warhammer, you will notice many times you won't even have one healer in your team, or it will happen to the opposing team while yours has plenty.
Another thing you will notice as you get higher, is sorcerers and bright wizards dominate scenarios in damage and usually kills. One extreme example is a level 31 bright wizard was being supported by 4 dedicated healers. At the end of the scenario he had 208,000 damage and 17 killing blows, (this is usually more or less double what the top person does in damage). With the 4 healers he was almost impossible to kill considering we had two healers period, and they had to try and keep up with his massive AoE damage while the rest of his team just added to the slaughter.
RvR content all boils down to numbers as well. Biggest zerg wins. I am hoping for some major improvement here in the future, just like I hear Mythic did with DaoC.
The PvE content is a joke overall, in my opinion. There is absolutely no challenge or strategy at all in it. You do not have to worry about pulling techniques, crowd control, or anything at all really. There can be 5 monsters or NPCs standing on top of each other, and if you use a single target ability, you just get the one. At this point in the game, most characters are capable of taking on 4-5 monsters or more solo anyway, in one fashion or another. The only real way to get an add you don't want is to be standing too close to a spawn point. The AI on monsters is terrible as well, if there is even any AI at all. Even the casterish monsters will try and melee you down, while casting a spell once in a blue moon for almost no damage.
The PQ's start out fun, but when you realize quest loot, or the rewards you get from Influence are usually far better than what you get for actually finishing the PQ. Most players have figured this out already and just max Influence and move on. Starting in Tier 2, and especially in Tier 3, you will be hard pressed to find a group willing to sit around farming a PQ over and over to have a shot at a rare reward.
I have been to one dungeon in Warhammer so far, Gunbad is the name I believe. This was actually pretty fun. The entire dungeon was a series of PQ style events with an instanced boss area at the end. The one problem here, is it more effecient to run the PQ's as a warband, (raid in WoW terms), but the instanced area at the end only allows one group per instance. So if you don't have say, two tanks in the warband, or at least two healers, everyone but one group gets to see the final area. I believe this is being changed somewhat. The reset timer to enter again will be lowered to 30 minutes which should help with the problem I just mentioned.
To sum it up my opinion, this game is a no brain zergfest. Each tier has one specific scenario that is usually run repeatedly, and there is zero challenge in PvE content unless you get creative and go out of your way to make it hard.
PS: One last thing in my rambling here.... I almost forgot.... AoE knock back. Think of a skill called Punt and the description reads "Kick all footballs within 30 feet in front of you 50 yards". Many classes get these, and by level 40 almost all classes do. If your not in Tier 3 scenarios, wait until you are. This is one of the most annoying aspects of the entire game.