Is EET worth the effort?

Hello,
with today's release of BGee:SOD 2.5, I was thinking about installing EET for a combined BGee+SOD+BG2ee game so I don't have to install like 25+ mods twice, and to facilitate easy transfer (via the console) of NPCs into campaigns where they don't belong (must get my Tiax on! And M'khiin really deserves a room of her own in my ToB Abyssal pocket plane).

I have read much criticism over the years of EET, and recently especially of Roxanne, but did not expressly seek out such things, so what I know may not be representative. So, questions:

1) How difficult is EET to install? I'm fairly practiced at installing mods, and did once play a BGT game.
2) Does EET in and of itself make any radical changes to the story line, or is that the province of Roxanne's own work and the mods she appropriated without consent?