IMO options on the leveraged ETFs is not appreciably better than equivalent options on the underlying, because the leveraged ETFs are themselves made up of options & futures.
For instance, for the January expiry, the ATM strike for QQQ has an IV of 14.6%, but the ATM strike for TQQQ has an IV of 46%.
Essentially, about a little less than four of the delta-50 contracts of TQQQ are functionally equivalent to one delta-50 contract of QQQ, and this is including the 3x multiplier, per dollar at risk.
So then, instead of buying 4 contracts of TQQQ, buying one contract of QQQ (at the same delta) results in the same 3x return per dollar at risk.