my times got from 60 to 80 avg and during a week of hard practise it was 60 again but with f2l, I never learned algs for f2l... 3 weeks or so after that I gone to 45 avg...
The greatest advise always comes up here in other threads, go slow and smooth, when you know intuitive f2l for 3 weeks you should be able to do like 90% of all cases blind without any afford, so you can look for the next pieces during solving one pair, even if you just follow one edge/corner of f2l, you will know exactly the position and orientation of that piece and got the 4 top layer edges/corners + 1-4 in the f2l spots where you have to look for them, you see some of those during following the piece anyway, so you got like 2-4 mostly to look for if you didn't find the piece before.
That's how I gone for it and it worked fine, you can say which pieces are possible to be the searched piece by ignoring all with last layer colour and with the 2 colours that aren't searched for, example, white cross, yellow last layer (boy sheme) you follow the red/blue/white corner, so you can say that all pieces with green, orange and yellow are not worth looking at.
Yeah it is obvious but sometimes you just have to think about those simple things...