I have spent a lot of time with a 2015 Tizen TV and I do have the opposite opinion. You should really spend some time with an Nvidia Shield Android TV and you will drastically change yours. If a TV manufacturer uses ****ty parts that is not reflective of the operating system itself. I also have never had to do any tinkering with Android TV but my experience was with the Shield Android TV and not the Bravias from last year (my 2016 Bravia has been great). All Android TV apps are native Java apps and not filled with a ton of HTML5 apps like on Tizen. If your an Android freak you should know that there is a huge difference in app quality when you do a web app vs a native app.spoken like a true Android fanboy.
the funny part, i'm an Android freak myself and ironically, it's the reason i didn't want my TV to run one. while, tinkering and tweaking is part of Android's "fun" on the phones, i want to avoid all of that on my TV. the picture quality is the "crack" here and if you're serious about your viewing experience in any way, once you see a unit with great picture performance you'll be happy to send settings to it via command line, you just won't care about anything else at that point.
i will assume you have zero experience with Tizen on 2015 Samsungs because it does exactly that - gives you blazing app performance and perfect picture controls with powerhouse DLNA features. i don't need to baby sit it wondering about magical updates that give false hope of an improved performance "in the next version".
There are 1.6 million Android Apps and it only takes two small lines of code to make an Android app work on Android TV. How many Tizen apps exist? 300? Google's voice search and database is nothing Samsung will ever be able to compete with not to mention how flipping awesome it is to have built in chromecast support. You think family/friends care about DLNA when they can Google Cast anything they want to a TV? Android TV is only just getting started. The internet of things is coming and the last company leading the charge is Samsung.