Lace plants should develop huge root systems. I think your tank might be too warm for it. I have the heater in my 30 gallon lace plant tank set at 74°F. It does get warmer in the tank do to the lighting but it cools off at night. Oddly enough I have apisto's spawning and raising fry in that tank. The NEW lace plant tank is a 56 column and the heater in there is set to 74 too, and I have at least 5 flowers in that tank at the moment.
Ten hours a day is a good light period for a lace plant, no more than 12 is a key I've found. I used to have lights on one tank for 14 hours, the lace in there didn't look so happy until I dropped the hours to 11.
The idea of 'shading' a lace plant is a myth created by someone who couldn't contol the algae growth in an aquarium. Lace plants love bright light. I have two 96 watt quad lamps over the 56 and the lace plants are looking oh so happy. I had 1 96 watt lamp over the 30 gallon tank and they were blooming in there for years.
What kind of substrate are you using?
BTW that lace plant should grow up and overshadow everything in a 29 gallon tank, they were smothering the 30 gallon tank I had them in.
Aquascape? I'm a crypt farmer.
It's a fine line between fishing and standing on the shore looking like an idiot.
That IS an aquascape, it's titled "The Vacant Lot".