NEVER BUY A CHIP!!! What you need is a VERY qualified tuner that understands the platform they are tuning. If you have a LS, you go to a LS shop. If you have a mustang, you go to a mustang shop. There are two major problems with tuning the TH.
1. It’s a new platform which means the proficiency level isn’t going to be where you want it with the vast majority of tuners. These guys are on forums too, trying to figure this stuff out.
2. It’s a new platform so there are going to be issues from the manufacturer, just like with every other new model.
IMO, wait at least 12-18 months for the bugs to get worked out on both sides and then see what other people have done and found out, then make your decision from there. Any amount of tuning is going to remove safety margins, the more power you make, the less margin there is for error. It CAN be done safely and reliably but not by just anyone.