Nethers certainly concentrates your mind so it should stand you in good stead.
I have to agree with BigFoot01.. nail those speeds. The approach is a tad steep but you shouldn't be fast no matter what the slope. All instructors have their own foibles so this isn't advice, but in a C152 I aim for 70kts on base before getting two stages of flap in, 65 turning final, 60 over the road (55 if I'm feeling happy) and then wipe off that speed quickly with the flare.
All of this with no power and no drag flap if you've got it right, and all of this in normal PPL training weather conditions of course. If you are doing full stops you should have stopped in around 250m - 300m.
It's normal for the instructor to clean it up. The last thing that you want is to do something daft with the flaps just when you should be concentrating. There isn't enough time or runway to make a mistake even with a high powered Aerobat.
You can't beat asking your instructor for advice though.
Just one final thing that wasn't clear from your title, make sure that you know the differences with short field, soft field, and short/soft field. You'll get plenty of chances to practice them all at EGNF.