Getting back into the game after a Year off.

Just a few questions: How's the community nowadays? Toxicity still high or has Riot started to get it under control? How have the build paths and items changed since s4? Anything I should really know as a Support Main? I used to play Janna a lot, is she still a good support or is she completely out of favor nowadays? Any suggestions if so? Thanks in advance! Edit: How come the downvote? You can check my match history to see I haven't played in over a year, genuinely asking questions guys.
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