The ones with the yellowing leaves is nitrogen, the ones with the rips that have brown spotting looks to be old and would not worry about that.
I would be repotting the bigger ones; check to see the root growth, it's easy to remove the root ball in those little potters.
The one with the yellowing leaves could be due to root space lacking or it's hungry for nitrogen.
All strains are different so some can handle root crowding much better than others, and some are very touchy.
The purpling stem is a normal trait color and is nothing to worry about.
Other than that they look like they are making a great recovery and starting to get a happier!
I would be repotting the bigger ones; check to see the root growth, it's easy to remove the root ball in those little potters.
The one with the yellowing leaves could be due to root space lacking or it's hungry for nitrogen.
All strains are different so some can handle root crowding much better than others, and some are very touchy.
The purpling stem is a normal trait color and is nothing to worry about.
Other than that they look like they are making a great recovery and starting to get a happier!