The title might seem a tad bit off but, let me elaborate before you read too much into it.
With the Isle of Thunder, the entire issue people ran into were two things:
1. Dailies (I have no personal problem with them)
2. Once all phases were unlocked, people got rather bored of the island and it basically became unpopulated
With Domination Hold/The Alliance equivalent, players ran into a number of issues as well:
1. Almost forced PVP (I never ran into this issue)
2. Dailies, again
3. Gating content through Dailies
Timeless Isle includes NO DAILIES. It has a number of real time events, rare spawns, rare events, secrets, etc etc.
You experience the island at your own pace; you find what you want to find or find things randomly.
The entire point of the isle is to in fact just explore, find cool things, come across story tidbits, etc.
It leaves the island as entirely optional (aside from of course those pursuing the Legendary Cloak) but also gives the players something more fun and not "forced" to do.
As for what you've seen (or even experienced on the island), what do you think of it? Is this the right approach for added landmass content?
My Opinion: I think it's a fantastic alternate to daily content to much of the community complained about while still adding much to do in the world.
Though I LOVED Domination Hold, I think the approach with the Isle is both smart and effective. If the Isle's approach is successful too we may be seeing more rare events and things of this nature in the next expansion.
Anywho, discuss! Love to hear your thoughts!