Wrong. Warden is still desirable mostly because they're the best aoe dps in game.
Which just means Wardens don't have any advantage, no that they're useless. They're just gonna get hit as much as every other tank.
Where warden tanks truly excels are instances with lots of mobs. You can pull everything at once and keep every mob in place thanks to Warden's great aggro control.
It's also faster than with any other tank, because you can debuff their mits, self heal (in 6-mans on T1-2 to the point you don't even need a healer in the group), and still do some solid aoe damage.
Also wrong. Warden is single-handedly the best solo class. It's a fellowship on it's own. You can just pull a whole area/instance and with said 3-4 keys kill them all. For anything less than that you can use just one key like every other class, Javelins exist.
The only thing you can't do with a Warden is Valar it and expect to be able to play it. It takes weeks to remember even the combinations of all gambits, not even talking about their proper use, rotations and positions.
E.g. when you're tanking a bunch of trash mobs in an instance, you're taking lots of damage and you don't have a healer you're most likely gonna try to build one of the healing gambits (Restoration, Conviction, or if you're smart Resolution), which is wrong.
What you should do instead is
double-tap Desolation. It'll fear every mob around you, give them a miss chance, give you time to build Resolution, deal a ton of damage and put a dot on them dealing even more damage-over-time, so you can focus on self-buffs, healing, more damage or debuffing.
If you're expecting a bit longer fight with them you might want to hit them with Exultation of Battle for a more permanent healing solution.
Persevere healing chain is mostly only worth using if you're facing a single enemy (boss) and/or get incoming healing reduction.
Here's a nice list of gambit effects if you want to do some reading:
https://lotro-wiki.com/index.php/War...uick_Reference
And cheers to that. You really do need to know the class to be able to do any sort of tanking, yet alone in end game. You can practice on T1 3/6-man though.
Also, running in and hitting everything with Defiant Challenge doesn't count as tanking.