DSE Han was great, but they ruined the figure by making another version of him for the anniversary set - as a result, he was considered the excessive version.
X-Wing Luke was more of a shock than a disappointment, in that it was a bold move, that was negated by a lack of accessories and a sloppy paintjob. If he looked as clean at retail as he did in SSG's archive, I would have purchased him, but I never found one I was satisfied with.
I suppose both Han and Luke will go through changes until a very nice likeness is achived. I personally like the Ceremonial Luke head from the POTF2 line. Han is still being debated on.
The next problem is Leia, because between the hair and the face, there are very few sculpts of her I like. I'm hoping they get it right when they issue a new Bespin Gown version.