Even that pot isn't an ideal size. You'll be fine with it this run and it's all going to be chalked up as a learning experience.
exactly what he said, if you plan to do this again i might recommend 7-10 gallon pots big root ball = big buds but I wouldn't worry to much about it just flower them out, you wont be disappointed.
-You did a good job bushing her out, how ever if you tied her down you would have a more even canopy for maximum light efficiency
-In terms of trimming the larf off the bottom it is personal choice, if you have enough air flow in the room and humidity stays below 50% I usually leave it on, if not then to avoid PM issues I open it up for airflow and to focus all power on the main Kholas.
Here are mine currently in a 8x4x8 under 2 1000's 1st day of flower vrs 7th day
Day 1
Day 7
So be prepared for yours to get HUGE
it looks like we are on the same or close to the same schedule so keep me updated on how much yours stretches and fills out