One thing I find hard to believe with Nemesis is that it took Troi and Riker 4-5 years to get married after getting back together in Insurrection. I kinda wish the film had had them married and already onboard the Titan
, I'm sure the audience could wrap their heads around the passage of time and off-screen character development.
As for who dies at the end, I was alright with Data sacrificing himself for Picard. But he should have stayed dead, the whole B-4 thing was such a cop out and should have been removed.
There are lots of other little bits that should have been changed or explained, but the biggy has to be Data 2.0.
Commander Austin Harris, First Officer, Deep Space Nine (by FltCpt. Bossco)
8.01 - Darkest Before Dawn
(Chapter 8 added, 12/09/2015)