Looking at other wheels, I noticed that ECL has an interesting hybrid and multicolor split. Counting full hybrid symbols as multicolor:
Pair: #multi, #hybrid
WU: 4, 1
BR 3, 2
GW: 3, 2
UR: 2, 3
BG: 5, 1
Avg: 3.4, 1.8
UB: 1, 3
RG: 1, 3
WB: 1, 3
RW: 1, 4
GU: 0, 4
Avg: .8, 3.4
The summary is that...