Go ahead and start aeration again. References:
When to Start Aerator ,
Help with Spring Startup I wouldn't bother putting in any more Fathead Minnows; Your BG are big enough to spawn well this year (presumably the RES too) and they will provide renewable forage for your predators. FHM would just be a one-time snack at this point.
You are possibly forage light (and hence relatively predator heavy, although I do not think you stocked too many LMB & cats for 1 acre) based on those stocking numbers. I'd keep a close eye on the condition and numbers of BG/RES and your predators; possibly an adjustment stocking of adult BG may be warranted.
If you had your heart set on spending money on more fish this Spring, I would add 50-100 adult BG (6" or larger).
Do you feed?