At one point weren't you running a pre-rooted Jelly Bean image that had the Knox bootloader removed?
I rooted manually back in the transition to Jelly Bean a little bit after getting my phone, and have kept it rooted since then. I unlocked the boot loader at some point, so that I could flash a custom ROM. Flashed CleanROM 6, 6.1, 7, 8 and 8.2, just keeping root and keeping my bootloader unlocked. Yes, CleanROM 8+ were 4.3, where the stock had KNOX, but I made sure to steer clear of the contaminated firmware pieces, just flashed the ROMs and the modem. They worked well, but I like variety, so had to move on to 4.4.2.
Now you're running the stock Verizon firmware with the Knox bootloader component, but you've removed the Knox apps?
Does Odin mode show 'Warranty Bit: 1'?
Well, let me go take a look *smile*. Don't really care what Odin mode says at this point, but here's what I see there:
PRODUCT NAME: SCH-I535
CURRENT BINARY: Samsung Official
SYSTEM STATUS: Official
QUALCOM SECUREROOT: ENABLE
BOOTLOADER AP SWREV: 2
No warranty bit in sight. And yes, all the KNOX apps are frozen using TB, so I don't think that they're running. Although I've found that's not an absolute guarantee that they're never going to be running *smile*. But I haven't seen them running, and they're not listed in the cached process list, either.
I think I'm on the right track here, since I let my phone set around idle for 6 hours after finishing configuring it today, and it went down from 100% to 98% battery. Not too bad. Nice and smooth too, and has everything that I need (I think). It'll take me a while to sort everything out, but all the basic functionality is there and working. Seems better than 4.3 so far, we'll see. Like I said, only 3 more months, and then no more Samsung for me.
Edit: It occurs to me that the warranty status may not be shown because I'm out of warranty, anyways, so they don't want to imply that there is an active warranty on my phone.