I think Gerrard would be terrific in the Firmino false nine position. In fact, I don't doubt he'd be better than Bobby despite my adoration for the Brazilian. Gerrard would play Mane and Salah through time and again with his incredible passing range, he'd pick the ball up deep and drive at the opponents, and of course, he would outstrip Bobby considerably in terms of shooting, especially from outside the box (something Bobby gets a fair few opportunities to do, but that he has irregularly capitalised on). He'd also be able to use his energy, strength and ball control to be a constant source of trouble in much the way Bobby does.