Tools they could add besides DPS meters... (For endgame)

[Brightamethyst]

I think a feature that says what you died from exactly in your own combat log would be really helpful, there were times I died and I was uncertain which mechanic caused it since the combat log only shows damage and no specific names

Agreed. The combat log really needs a "what happened to me" filter. Sometime you die without knowing why (especially in new content) but the combat log is absolutely worthless for figuring it out.