OMG, I have the same question. For me, overlapping runs are a great automatism to unlock defense and I'm struggling to replicate that without attacking FB/WB. Since using 3-2 build up with 2 IFB and Libero, I have to switch to underlapping run with central mid-attack, and it's just not as effective. I tried with mezzala, but they just don't combine with IFs to make overlapping runs often enough.
And how do you guys improve your attack, I mean, my 5 Attacking players do score, but a lot of the time it comes from individual abilities, long shots,... Underlapping run do happen with central midfield, but they often shoot rather than pass the ball to free agents