Acrylic Difficult to Master

I am basically a painter in oil but, perhaps ironically, the more ‘serious’ painting I have done recently have been in acrylic.
This may have been something to do with the scale, larger canvases. I find it easier to cover larger areas with watered down acrylic.
There is also something about the immediacy of acrylic. You have to work fast, so maybe this makes me worry less about detail and look at overall effect.