While it makes sense points-wise, a 2Lz is seen as a novice maneuver. Other than 2T/2L in combos, I don't think seniors should be incorporating doubles in their programs. Also, a 2Lz-3toe combo presents far greater risk than a 3T-2T. Any time a 3T is on the end of a combo, you risk underrotation (in ladies, at least). The difference between 2Z-3T and 3T-2T combos is 0.7, but an under-rotated 3T on the lutz combo means a loss of 1.23 points, not to mention the GOE hit. And if I were a judge, I'd be like "A double lutz?! I thought this was seniors..."
The difference is .8, actually. I wouldn't say the risk is much greater really, unless you are a bad combination jumper period or have serious lutz edge issues. Regardless, 2F-3Toe is still worth more points too. Kostner won Worlds last year with 2Flip-2Toe combo in her LP. She gets the highest PCS of anyone all year at Euros with both of her Salchows doubled. Judges aren't going to look down on a 2Lz-3Toe combo or a nice 2Lz that flows right out of the choreography.