+1 to all of the above.
Glosso will grow upwards with low lighting, I have close to 5 watts per gallon and it still has a little bit of upward growth.
I too think that individual planting of each plantlet will give you better results. I originally plated them in big clumps like you, then had a OCD kick in and planted them all individually.
One singular theme looks better IMO, the rocks on the right looks cool though.
Lastly, the glosso on the right will require frequent trimming to keep it grounded, it requires high light as well so I am unsure how well it will do in a deep tank like that.
Good luck and I look forward to progress.