Abigail, your method of class construction is deceptively simple and (without trying it in anger) appears very robust.
This is a bit like asking the vendor what is wrong with the house/car/London Bridge he is about to sell you, but
Are there any weaknesses?
If so, what are they?
Okay you lot, get your wings on the left, halos on the right. It's one size fits all, and "No!", you can't have a different color.
Pick up your cloud down the end and "Yes" if you get allocated a grey one they are a bit damp under foot, but someone has to get them.
Get used to the wings fast cos its an 8 hour day...unless the Govenor calls for a cyclone or hurricane, in which case 16 hour shifts are mandatory.
Just be grateful that you arrived just as the tornado season finished. Them buggers are real work.