Glosso looks great against the black substrate, i just bought 2 pots of Tropica glosso and was going to plant them this weekend, but thats amazing growth in 2 weeks, bit scary growth, id say its true about it being invasive, im just fed up with the lilaeopsis brasiliensis microsword after the bba and everything it just grows to slow and is prone to algae, so i guess the glosso will be the opposite probably growing to fast. I also got some Eusteralis stellata, ill just have to see how that one goes it can be a very difficult plant, i will give it a little while and if its not working out i will try something else.
Well you daughter is doing a great job because the tank looks in great shape, the glosso looks great IMO but easily changed back to the sag if you tire of it.