i like to use square pots, to maximize the soil available to the plant. If you thoroughly watered after the transplant, which you should do,(2 days ago) i wouldn't worry about it being overwatered, just let it dry some, and i echo the others, def could use some more drainage, vermiculite, perlite, lava rock, whatever. That mix looks like its probably made primarily of forest compost, and that can be acidic.
Plant looks good though. I'd go with a different soil next time, personally