bearfoil & Turbine D - Having been around aircraft engines 55 years (and very close to turbines 44 years) I'm well aware of the semantic issues. Every reference I've found for the "EGT" abbreviation - regardless of the shop it came from - says it's EXHAUST gas temp. That's obfuscation, because I think P&W was the last company to actually measure it at the (core) exhaust.
Thermodynamically, and from a response-time standpoint, the LPT inlet is the right place to place the chromel-alumel thermocouples that (I believe) are standard on most engines.
And "overdesigned" vs "overweight" - in my experience they're nearly synonymous IN MOST CASES. The modern engine shop cannot afford either, although it's certainly nice to build some growth capability into a new design. The CF6 did this rather well, starting at 40k and growing to over 60k while improving just about every operating measure. After its early troubles, customers came to regard it as a desirable powerplant.