Lucien did not desrve what he got. He was truly a lover of Sithis and the Brotherhood. It was a real shame to see him framed and strung up. He and Vincent were the only ones I was sad to see die. During the Purification, I always killed Vincent first, in his sleep, so he could go peacfully and not see the DB get purified. He deserved at least that much.
Vicente was my maker in Oblivion, and he was far and away the most well balanced member of the Ob DB. Tienaava was also less psychopathic than the rest of them. The Shadowscale characters in Ob and Skyrim are among my favorite members, since they seem sane, but I have to say I am sick of the mostly 'looney nut-job' type characters.
Lucien deserved to be flayed because:
1. He was an idiot, because he thought I would be okay with him showing up uninvited in my house, and
2. He was an idiot because he thought Shadowmere was female.