I've got an early 2011 MBP which has exactly the same issue - I'm on the third logic board (GPU and a chipset both went on separate occasions within 3-year warr

I've got an early 2011 MBP which has exactly the same issue - I'm on the third logic board (GPU and a chipset both went on separate occasions within 3-year warranty) and second battery (battery wasn't due to heat though, just capacity), I use it heavily for programming (compiling) and rendering, so CPUs are often maxed out. I try and make sure it's ventilated properly (when I use it on my lap I often hold it in the air when the CPUs are busy and the temp is rising), but I'm not convinced the design is good for cooling in general.