You have to EXPLORE the world, you cant just run through it and finish the objectives. Why would you run anyway? Revision is about new areas while keeping the storyline, if you wanna run through it you could play vanilla.
There's a difference between exploring the area because you want to take it all in, and exploring the area because you're trying to figure out what to do. If there's anyone who enjoys a good atmospheric game, it's me, but being forced to remain in an area simply because you can't figure out where to go isn't fun. It's frustrating. I will read the datacube again, hopefully I'll be able to figure it out this time.
EDIT: Okay, so I found the temple, unfortunatly, the doors don't seem to open, and I can't find another way in.
EDIT #2: Alright I found it. Thanks for the help.