2016 a 'boring year' for big political/geo-political events in the West?

  I think you would really need about 50% support for Farage because of the horrendous way our electoral system works to benefit big established parties and I suspect that could be beyond him.  If UKIP did get in then it would probably be a disaster as their all over the place and even more right wing that the Tories.  Plus Farage for all his attempts at appearing a man of the people basically comes from and belongs to the city of London so he's unlikely to do anything to tame its excesses.  You would be likely to see widespread anger in core UKIP supporters as the city continues to get pampered by a UKIP government while he's happy to see the rest of the country go to the dogs.  We might get out of the EU but its likely to be an even worse mess than what May and Johnson handed us OTL.  Also your likely to have a lot more racial tension given some of the extremists in UKIP - basically British versions of the Proud Boys but less organised and violent.

  Clinton was polarising in part because she was a woman, which upset some of the ultras and because she was Bill's wife and he was a very successful and popular President in the 1990's despite his private [or not so private] life.   With the Senate already in Republican hands and likely to worsen in 2016 you are likely to see the government even more gridlocked than it was during Obama's 2nd term as the Republicans block everything they can.  This might including continuing to block any selection of a replacement Supreme Court member.  As such the US is likely to be pretty much as divided as OTL unfortunately although while a gridlocked government will prevent much good policy your less likely to see Trump's disruptive activities so the US stays more interactive with the rest of the world.  It could be interesting if Russian involvement in the 2016 election becomes questioned as the security services information will be supported by Clinton and the Democrats although the Senate may block and actions to penalise Putin and Russia. 

  What you could see might be a reaction against the Republicans however in 2020 simply because the bulk of the population would be fed up of the division and continuing blocking by the Republicans.  Especially if Covid still comes along and the Republicans seek to stop safety measures as OTL in response to Clinton trying to save lives.  That will mean markedly higher deaths in areas controlled by Republicans which could come back to sting them hard.  As such your likely to see something like 2020 with a reaction in favour of the Democrats after a Republican surge in 2018, but possibly stronger as there would be less misinformation coming out of the White House.  2020 is still going to leave a very divided country but probably a few more people alive because the government recognises the problem.