The following is pasted together from past messages I've sent regarding advice about eng+society - i hope it still all makes sense:
So, society is AWESOMESAUCE. You have another year, but the workload is spread out over another year, so compared to everyone else i talked to i had a much lighter schedule and load.
Besides that fact, you also take society courses that deal with environmentalism, history of technology, inquiry, and soft skills like presentations, meetings.. etc! The profs are SO awesome. I've really found professionally the writing and social skills have helped me.
ALSO you get to take focus electives perhaps towards a minor!! I got a minor in theatre and film studies! Those courses (sometimes) as well as the society courses REALLY help to boost your mark which is HUGE, for me at least. Society courses with all the work done decently are pretty much automatic 10-12's. Electives, depending on the course, can make it all better, too! ^^
As far as society assignments... most classes we had a paper due every week (double sided page double spaced - if you have an idea on what you want to talk about it takes like 20 minutes to write in one sitting) as well as our major assignment at the end. The project was done in groups of three, but you had all year to do it. It was about 20-25 pages total. 2nd year first term (1st year society) was an inquiry (ours was "why do people shop at grocery stores instead of the farmer's market?") and second term was a technology research project (a technology thats at least 300 years old, review it through time - we did music players.) Later you do more inquiry-based stuff and research projects... I always found it very enjoyable and the people around you are generally hardworking and you can trust them in group projects.
I really enjoyed it If anything its writing practice - and engineers dont usually get much creative writing done!
I can also tell you that in your final year you do an inquiry (with society) with any supervisor of your choice on any topic. Some people have done it on chemicals in the water, semiconductors, why Dr. Baetz is awesome, and I did mine on sustainable feminine hygiene products (I was on such a huge kick about them!!). It's really rewarding to do your own ISU on something you REALLY care about.
TL;DR: Society is awesome if you want to decide your own path and be a critical thinker!