All five T54PRO's are now in place.
One new (front of house on left, looking right), one replaced 5442 S2 (front right, looking left), and replaced three 5231's (back corner, looking up left side of house (driveway); other back corner, looking up right side of house; back right corner, looking at full backyard).
It was not an easy swap because the T54PRO wiring harness is very different. I needed to extend the Ethernet cable a few inches on 3 of the 4 replacements. Thankfully I had slack in the ethernet cable in the basement that I could feed through, though I needed to totally unwrap and rewrap the protective covering to extend the cable, which took some time, but all done now!
I also replaced all four of the old PFB203W's with PFB2203W's. Yes I could have drilled new holes, but wanted a clean new setup with the proper threaded holes. I also handled the wiring harness differently for the four new T54PRO's. I wrapped every connection in electrical tape except the Ethernet connecter, and then folded them all together in a plastic baggie and wrapped that in electrical tape. I then took the entire baggie and stuffed it in the PFB2203W with only the Ethernet connecter protruding outside of the PFB2203W. It's only extends a few inches, thus why I need to extend the old Ethernet cable to reach the connecter. All five T54PRO's are completely installed and protected now, all set for winter.
All 5 have their varifocal adjusted to mostly match the previous zoom. Front left zoom 930, Front right 1773, Driveway 1260, Other Side 2426, Backyard 1265. I did notice that the side that's set to 2426 is the maximum and I could not get it to match the 5231 which was further zoomed, it's fine but I would have liked it slightly more zoomed to match, but again it's fine.
All five are now running the new 10/28 firmware, and to start ... running in self-adaptive mode ... again, just to get started before I start tweaking. Wanted to see what auto mode looks like. I also have AI SSA set on all 5, but not sure that's a good thing, wanted to see how the cameras adjust themselves.
The five cameras give mostly a 360-degree view of the property, with the two front cameras also providing a look down the street both right and left. There's now only a few very small blind spots on the property, where one camera doesn't overlap another.
IVS Tripwire's are setup to Synology Surveillance Station recording 24x7, with snapshots saved at every IVS trip, which I review daily. It's setup mostly for humans only, but the driveway is also setup for cars. I did some initial testing last night and all was fine except the backyard camera kept missing the IVS a few times when I crossed, not sure why yet. I set all up at 8 sensitivity, but was still struggling with the tripwire in the backyard, really weird, not sure why yet. I've had 100% success with IVS previously, though finally no cats and squirrels!
I initially set all five cameras to 24x7 Color and it was wild how bright the two side cameras and the backyard were compared to the 5231's, but that was a complete failure.

It dropped the frame rate to below 13FPS at night and when I walked around the house last night the video was terrible with motion, just not enough light especially on one of the sides. I've now set all five to AUTO mode for Day/Night, which did darken the picture slightly and it then totally switched the one side to IR at night. I also started playing with the setting to turn on the light for 15 seconds when the Tripwire is crossed between 9pm-6am for the two side cameras and the backyard.
Today it's raining so no glare, will let things settle in and rest today, and then start tweaking, with all the great advice in this thread. It was a long day yesterday.
Wish I had one of you experts to just come over and set these five up to be perfect!
While I'm very computer/networking experienced (my profession), video hasn't been my thing, at least not yet.
Thanks again for all of the help here.