Sadly, it's only you who can make that decision as you have to look at the common problems and see if you would be happy to accept them or not.
Some people are happy with their CX60's, some people are not, some people are on the fence hoping Mazda can fix the varying issues over time etc.
So I can only say that I personally regret the purchase. Its not a bad car by any means, it's rather nice in many ways, it's just not really finished - it certainly shouldn't be hailed as a premium vehicle in its current guise, and the sales literature is not honest about what to expect from it.
You know the common issues now, so only you can make up the call - think about it like this - if you get all the problems that have been listed on the forum, would you still be happy with it? If so, then buy it, if not, and you can find a reasonable alternative for the same money, then don't or think about the CX60 Diesel as this should eradicate all the transmission/drivetrain issues and poor mpg/range etc.