the trello board looks great so far! i might recommend using labels for priority (red-high, yellow-mid, green-low) since you're already using lists to show what stage a card is at--no need to show stage in columns and in labels. you can also make labels for categories like design, programming, art assets, etc. and use multiple labels per card.
also the motion definitely feels v much like it's underwater! i'm not sure i can offer advice on how to solve those problems and i might have missed it but have you mentioned what engine you're using in case other people in the forum might be able to offer advice?