Purple Queen Auto Micro Grow 2l Pot

I think I messed up my Queen :) Nutrition deficiency took over and I couldn't find a proper solution. It all started 2 weeks ago. The bottom leaves started to turn yellow and it slowly went up to younger leaves. They developed a purple color and started to show signs of burning. So I decided to change soil and I will see what comes next ;) If you have any ideas please let me know! Thank you Update: after changing her soil and increasing bloom fertiliser she started to look a bit more vital and budsize grew a bit. I'm suprized how she compensated stress caused by soil change. I tried to be as careful as I was able but I couldn't avoid to harm her roots.