The problem is the high assysetric thrust at or close to Vmcg which needs deft footwork to stop a spot of gardening. On the 330 with the F/O as PF, the first seconds of the acceleration I watch like a hawk as I need to step in VERY quickly if it goes quiet on one side, or worse still if it stalls as some of the Trents did before the mods were done. Leaving the problem with assymetric will just drive you off the runway.
At high power settings on the Trent, the stall surge protection helps as the initial acceleration of the engine is very slow compared to other types - you will be surprised to begin with.