The area around CN tower is very interesting. You definitely need a few days to get to know everything properly. The day I went to Rogers Centre was baseball match day and the place was crowed. Very. The atmosphere was really fun! The queues were incredible long but eventually we found our way inside.
We found our seats easily. Lots of places to buy snacks - basically hot dogs, peanuts and chips. The beer was super cold and just perfect because we were in the middle of a heatwave that day.
They also have there official Jet's shop. I found it a little expensive but I believe Blue Jets funs won'y mind it