> And while we are at it stop tunneling my data back "home" when I travel. I don't want increased latency.

You might not, but a whole lot of customers who aren't as technically sophisticated did. When T-Mobile first started doing included international data roaming, they didn't tunnel back. That caused a lot of confusion from customers who didn't realize why stuff they expected to work, like checking their bank balance, didn't. (It also made throttling speeds a lot more difficult.)

So to fix that, T-Mobile tunnels you back to a few endpoints in the States. Banking apps are generally happy, as are Netflix and Spotify. Most customers are happy because their phone "just works" the same as it "always has".

For those of us who want to avoid the latency, we get a local SIM for data (if possible).