I'm having the same issue of lower than expected earnings. I suspect the issue is with the Lyra2z algo, not a specific coin or mining pool. Last week, I started out mining GIN on Angry Pool. Then, I switched to mining MANO on Gos.cx. Now, I switched to mining XZC (which has a higher market cap) on Mining Pool Hub. While the calculators estimated I'd earn a little more than 5 XZC per day, I've earned less than 3 in the last 24 hours. I've had similarly disappointing results with the other Lyra2z coins on the other pools. Maybe it's time to go back to mining ETH...
What does it mean that Lyra2z is a "chained algo" (Blake256 first round and Lyra2 final round)? Is this throwing off the calculators?
I will start mining GIN with my RX rig today on Angrypool and will check yield on 24h. Lets see how off it will be than calcs. I will post results in the weekend. That rig was mining UBQ and if GIN yield is so low than what calc says I may go with ETHash coins again. But I like the low power consumption of Lyra2z also.