I stopped doing world bosses because the power creep made the bosses less of a challenge. When Tequatl was revamped, I remember having to coordinate via TS (TTS or EG guild anyone?) to get good, complete raids. I used to run it with EG back in the day, and their coordinated runs were top notch. I want open world bosses to feel like open world RAIDS. And have rewards that match the challenge.
But, expansions and skill reworks have made huge DPS gains and the bosses (including Teq) did not get balanced to keep up in the DPS race. In my opinion, a battle of mechanics > a battle of DPS. If I can auto-attack a boss with a guardian scepter and not have to do any other movement, then the encounter is not worth my time. And any encounter that is that easy is not worth improving the drops on neither, because the required effort does not need any higher reward than what is already there.
Anet, please consider reworking the world bosses, and by doing so, consider enhancing the mechanics instead of just increasing HP.