What didn't help is that Adolphe, Alain Mpela, and JB Mpiana were strong enough dancers to take the pressure off Amelia during concerts and clips. The trend continued in BCBG, because the sebene of Titanic were slower paced which made simple choreography effective. By the time he joined Masion Mere, Flamme was cementing his explosive solos from Kibusia Mpimpa, the dances used a lot of gyrating hips, and complex moves in sync.
At least Ferre had the benefit of that transition period from 4x4 split until Intervention Rapide Force where you can see in the concerts that he's working on advancing his dancing skills. By Solola Bien, he's pretty much a complete dancer. Aimelia joined them mid-tour and I don't think had the intense one-one-one training that Ferre had from late 1997 to late 1998, it makes the difference