The highly praised philosophical content is ridiculously short. Barely a few sentences. There is not much talk at all in the movie. Google up the script. It's short. Really short. Most of the movie is action and slow shots where nothing happens and this is the best part of it.
Actually when I saw the anime for the first time on VHS, there were those hardcore manga fans complaining in the same way about it. Now today I see the whole /r/scifi going up in fire on how shallow that was. Just to praise the next super hero reboot a few weeks later.
I've been in the cinema to watch GitS and I rarely go there. I expected crap. What I got was a beautiful designed cyperpunk action movie that delivered more of a story to one of my favorite characters then the original movie. It couldn't end up being better with all those messed up reboots currently so popular out there.
You say the dialogue was bad? So I guess you speak Japanese because all translated versions of the anime I've seen were...let's say: basic stuff blown up.
Hope none of your friends who would listen to you were GitS fans because this is a must see for those.