Here's the old and new ITL rules for number of dice on rolls against defending UC types. I've also included all the proposals so far. I like V1 myself, but others like V2 and V3.
Code:
talent new ITL old ITL V1 V2 V3
UCI - - - - 4
UCII - - - 4 4
UCIII - 4 4 4 4
UCIV 5 5 5 5 5
UCV 6 7 6 6 6
- means barehand defense not allowed