I may be able to give some insight into this. Ive had my 2017 1.6 Levorg for 18 months, and previously ran an Outback 3.0R, which is pretty much the same as a spec B but with rubbish handling.
First thing to note is that there were 2 versions of the 1.6, with the "facelift" coming in 2017. This has many upgrades from the first ones, including suspension settings, the addition of EyeSight (adaptive cruise, lane departure, brake assist etc) and crucially, a recalibrated CVT, which addresses most of the criticisms of the motoring journos. It drives a whole lot better than the earlier ones, and the eyesight system is excellent (all the individual elements can be easily switched off if you want). So I would advise holding out for one of these rather than a 2015. They're easily spotted by the two cameras visible behind the windscreen either side of the rear view mirror.
The idea of a CVT puts a lot of people off, but most of the negativity comes from people who have never driven one. It suits the 1.6 turbo perfectly, with it's max torque from 1800rpm, so it doesn't rev high like a Yaris or something when pulling away. The whole drivetrain is very smooth, and it's deceptively fast. There are 2 Si drive modes, I and S. I use S as default, and I for cruising motorways. It's a much better transmission than the 5 speed auto on the spec B. The car isn't appreciably slower than the 3.0R, except from a standstill, but who cares? Once rolling, it's plenty rapid enough. The handling is spot on, very much a Subaru in feel (I've had 7 different ones). Fuel consumption isn't great, but 35mpg overall isn't bad by Subaru standards. It runs on regular fuel, and costs £150 pa tax.
All in all it's a step up from the Legacy gen4 in just about every area. Very happy with it.