I've read enough crash reports to see that helicopters discovering too late in takeoff that they lack the power to fly out of ground-effect is a serious problem.
I am wondering why the following isn't standard takeoff practice: Establish positive climb rate out of ground effect before beginning any translational flight. Failure to climb out of ground effect would be cause for immediate ATO, and there would be this nice landing zone to abort into!
(Only in exceptional emergencies, like when a mountain takeoff gives the rotor-craft a clear glide-path into denser air, would it be reasonable to ignore this procedure.)
(I note that I am assuming that translational flight out of ground effect is always more demanding than hovering. I vaguely remember that this is not the case, but I don't remember why, and it seems counterintuitive since translational motion always establishes a retreating blade with lower lift that then needs a higher angle-of-attack and more power to maintain lift. So if the helicopter can't climb under full power with no translation, it would not be able to once it tries moving forward.)