I too switch to Flourite recently, and can share a little experience.
Although Flourite contain loads of micros, but its slow release, for heavy root feeder such as that huge sword I have got in there (24" tall), a piece of Duplarit K make quite a different, I get better colour, and better growth; but smaller plants didn't show any different.
Also marco spikes do give noticable boost to most plants.
Eheim pimp club #48
800L 100% Flourite
80L plant/shrimps nursery tank inconnected with the main tank
Total 600W HQI, 2 X 5200K 2 X 6500K
Eheim 2028 X 2 2080 X 1
Dupla Substrate Heater
Dupla S external reactor
Aquamedic 2hp & Teco R15 400W chillers
Sega pH Controller
Light period: 6 hours on each bulb across 12 hours
Water Parameters: pH 6.4, KH 2, GH 1, NO3 40, PO4 1 TDS 250