You've got it almost down LOL--Sat I also do back & abs.
I've been doing this routine for over 10 years--I might exchange one exercise for another a couple times a year (which is one thing a gym is great for, you have so many options), but generally it's stayed the same. Oh & I have changed the body part split--first I did back/chest & bis/tris together, & I changed that, then I did legs/shoulders & chest/tris, but I switched that this year.
The only thing I vary frequently are core workouts, but I find more & more that Core Max is the only workout that really gives me a good burn.