Simple Choice vs T-Mobile ONE: Tethering & Tablets

- Member Since: Sep 26, 2016
I have Simple Choice and have a tablet with 6GB of High Speed Data (with a $10 credit for also having a voice line).
I am considering making the upgrade to T-Mobile ONE, being a T-Mobile customer for over 10 years.
My concern is all their legal jargon about the way they will treat customers who use Tablets.
I saw that Tablets can be unlimited for $20/mo as long as you have T-Mobile ONE for a voice line. This is what is most attractive.
However, I am concerned because I use my Tablet PRIMARILY for Tethering. The Tablet is pretty much acts as my Wi-Fi router in my small apartment, and it works fine. I sometimes go over the 6GB, so I have to walk to Starbucks for high speed internet until the plan resets.
The wording on some T-Mobile ONE promotional ads explain that "on device browsing must be the primary use over tethering) which sounds very CARRIER not UNCARRIER. I should be able to chose what how I use my Tablet Data. It mostly is used as a Router and that should be my choice.
So if I upgrade to T-Mobile ONE, what exactly would happen? Would they shut off my hotspot feature, will they slow it down to 2G (I also saw that hotspotting is 3G, which is silly).
What exactly is the point of being UNCARRIER when they want to decide how you use your Data. T-Mobile ONE sounds like it has many new restrictions, forcing all new customers to opt for Unlimited Data even if they don't need it.
So, since I use Hotspotting as my primary use for my Tablet Data line, should I stick to the 6GB Simple Choice, or go for the Unlimited Tablet Data?
Anyone in the same situation? Anyone knows what T-Mobile will do if I only hot-spot my "unlimited" tablet?