The junking of the Alliance in favour of a full merger of liberals and social democrats was a serious mistake but Williams was a prime mover in this. It removed both the possibilities of a social democratic party and a liberal party. We are back to two party politics now, in England.
I was never able to work out where she stood politically. Started off as traditional centrist Labour, left party due to leftward drift, but never really established herself as a social democrat. Her reputation as a minister was of someone who dithered and could not make a decision.
I dont think she ever resolved in her own mind what she really stood for. Held some illiberal views garnered from her catholic faith, opposing, for example, gay marriage. Was fiercely pro Europe.
Still, a thoroughly decent sort, respected on all sides.
RIP.