Personally, I don't mind there isn't a map. It will take time to learn where all the twists and turns lead, but that's okay. Having to explore and figure things out for yourself rather than being handed them on a platter I think is at the very heart of good gaming. I like that the battles aren't boring; as a trio (42 Warden, 52 Paladin, 80 Wizard) we had to work our little butts off at times to stay alive, and I think that's great! Boring battles where it's over before it's begun aren't exciting nor make for memorable gameplay. We play on Varsoon, so unsure what it's like on live. I tried solo too and it was quite difficult, doable, but difficult - again I had to be very careful (I'm the warden). I do know that I would have absolutely zero chance in the Darkpaw Warren with my guardian however, and that's unfortunate. It shouldn't be this way. I think on balance it's overall too difficult and that will sap the enjoyment for many players.
It's clear the bosses all have some dance-step (mechanic) you have to fulfil or they wipe the floor with you. After trying (as a foursome; with Mystic) we weren't able to defeat any we came across, which was a shame, and disheartened some. We'll see how it goes over time, once we figure it out (or more likely, end up giving up and looking up a guide).
I think the drop rate for certain components that are required for crafting the unique Darkpaw items to be used in the Warren is a little low.