GSI tweaked assassinations in general a little while back, it is now common
for 45 point CL assassins to be killed by thier respective targets. If you
were to hamstring the CL further then it would actually make the DS
completely unplayable, the GSI tweaks have already given the FP a major
advantage.
To the point that the DS win more than FP, if you look, you will find that
the better players tend to play DS more that FP because in general the
weaker economic and millitary of the DS make them more of a challenge.
With better players, the DS should win more often that lose. I would say
that this goes more to explain why up until now the DS have won more games
than the FP, but as soon as games that started after the "tweaks" start to
fininsh, you may find that the best side isn't always winning.
Nick.