Hey - thehazzle. How long until you repot these? I developed algae-roots on one that I potted in a clear container. It went away immediately after I put foil over the clear container. It's not an issue if you plan to repot or pot-in-pot before the roots grow along the sides of the cups.
Those stems look long, but not what I'd call spindly at all. They're actually kinda a bit beefy imo. Will they be in a breeze and/or under strong lighting soon?