Considering seeking a trade, talk me out of it

Basically, I'm a novice photographer. I enjoy doing photography, but I honestly don't find that much time to go out and do it, being a full-time student in a non-photography related major.

I currently have a Canon Rebel T2i, and I've been extremely happy with it. I have no complaints, except that it's large and I'm not able to carry it with me when I'm not going out specifically for shooting. It should be noted that I only have and use the kit lens, 18-55mm. I'm considering seeing if I can find a trade for a Sony RX100, but wasn't sure if this is a good move. It seems to be a popular camera, and it's definitely smaller to the point that I could carry it around with me, but I don't know if it's a move I should make.

I've heard it said that the best camera is the one you have with you, but I obviously don't want to make a change I'm going to regret. Any thoughts on this? Also, how adjustable is the Sony RX100? I use the exposure, aperture, and ISO adjustments regularly when I'm shooting.