Hi and welcome!
How is the ED compared to the RS?
Indeed you need good front brakes, the oem front system is really bad.
I’m racing my Cupra in timeattack events and I’d say the R32 rear brakes are useless. I did this mod as all the others but this is just upsprung/rotational weight added, no real braking improvement. The WTCC Leon had only 253mm rear brakes and massive 362mm frons. That’s why the R32 rear brake system is used only on heavier, 4wd cars. A good Ferodo DS2500 pad or Pagid RSL19 will be a much better mod.
Cheers!