I agree. High volatile machines that have huge jackpots only go so far with the seasoned player. Seems every video slot out there is tied to some huge progressive. I think Universal's plan in the mid 80's was the way to go then and now.
It was high % payback with low jackpots that would hit more frequently. It was a hit then and could be again. People played for hours and the machines didn't sit empty for hours at a time like you see now. The casino got a lower take, 2.6to4% but the amount played made up for higher payback percentage. You kept patrons in your building, they need to eat and maybe stay there too! So more money spent there.
I catch myself playing more video poker than ever before and 95% return Keno too. Makes your money last much more than slots.