So I have been finding seige expanding working a lot better since the patch. Granted I'm still climbing the platinum ranks and mopping the floor with the noobs, and can't call this SUPER viable, but the build is loosely this:
15 Rine/Orbital CMD
17 Ref/SCV Mule
18 Tech Lab
18 Factory -> Tech lab -> Tank/Seige
30 rax -> Reactor
Starport and Engineering bay are usually interchanged depending on what i scout somewhere typically right before or after I expo.
I usually pump mauraders and SCV's continuously as well with tanks, it gets a little more loose as the build goes on, but this is quite safe against really all races I've found. Usually immortals aren't too big of a problem against a few tanks for defense. But the whole idea is a timing push around 100 supply or so with marine/maurader/medivac.
Its a situational build but if your opponent is going for the roach rush or straight up rush of any kind they will likely be dominated. However, the build might be hard to counter other faster fast expand builds, but overall I feel comfortable against rushes and comfortable double expanding if need be. I like switching my builds up a lot, but lately, this one has been my trusty gun. But hey, lets have some people watch their replays and post some builds that they have been trying to make and see what has been working for you. I was a really big fan of a marine maurader adaptation I had pre patch, but the changes in the patch really had me taking another look at meching early.
Thanks for reading!