As someone with martial arts experience, I watched both training videos prior to this and they both looked bad. Here, Tesehki looks much better. Lex seems to have cleaned up her form from her baddies fighting too, but she is lacking many things right now.   
\- She has no chain rotation, when you strike, ideally your foot rotates, then your leg, hip, core and then shoulder. Lex is just throwing punches with no rotation, which makes them have no real whip effect.  
\- Her stance is HORRIBLE. It was not good before but atleast it was natural. right now her arms are squared and her feet are in a bladed stance. Which makes it very awkward and harder to throw fluid, rotational strikes as we can clearly see.  
\- Her angle cycling is very predictable. She is only cycling to the right, which makes it easy for Tesehki to predict her position.  
\-And worst of all, she STILL does not defend herself!!! That has always been my issue with Lex's fights. When Tesehki strikes, the other hand is always guarding her face. Lex drops both hands when she strikes and puts then both back up when she stops striking which leaves her open for madd face shots.

From this video, if Lex wins imma be very suspicious

I stand corrected Tesehki looks MILES better