Your spilt could work:
Mon/Thur: Speed/UB
Tue/Fri: Agility/LB
Wed/Sat: Fitness (Tempo or Shuttles etc)
Sun: Rest/Recovery
I would alt the above spilt with something like this every couple weeks/months:
Mon: speed/agility/UB
Tue: fitness
Wed: speed/agility/LB
Thur: fitness OR rest
Fri: speed/agility/UB - higher reps
Sat: fitness OR rest