I don’t really care and I do them every time. I think the rewards are about like tributes.
I am not guaranteed a certain amount of stuff every time I collect tribute. I can get 0 kingdoms. It’s a valid result. Tasks are kind of like that. Some days I’m doing them for 8k gold. Other days I get 30 gems. It’s still stuff I didn’t have access to before.
To me, the real reward is finding some team with enough synergy to make a handful of explore matches possible, and playing in a janky manner breaks up the monotony. Sometimes I get a runic or arcane traitstone while I’m at it. Bonus!
I’m way more OK with an optional daily task delivering a low payoff than I am with spending 55 weeks worth of mythic ingots to tack on like 1 player level worth of stats to Dawnbringer. But if the daily tasks gave me 50 gems, maybe I’d think about changing classes every now and then.