More skill to long distance shooting.
It doesn't take an awful lot of "skill" to perform successfully. There's not a huge skill gap with the feature.
It messes up normal shots? I press circle once and it sometimes messes the shot up horrendously. This doesn't seem to happen with timed finishing turned off.
Creates a lot of cheese goals that are incredibly unrealistic.
I genuinely couldn't think of any more pros. It's pretty clear my opinion on it. I think they got a lot of things right with this years FIFA, and I understand the intention behind timed shooting, but I don't think shooting was what needed a skill gap.