Ah yes - forgot about Goo. For quite a while it didn't support flashing TWRP anymore, but it's back.
There's also TWRP Manager (which I haven't tried yet) and Flashify which I really like.
It does make flashing a recovery easier, but.....
Call me old-fashioned, but all of those require Android to run. What if you're stuck in a bootloop and need to flash a recovery, clear partitions in fastboot etc? To get drivers working when the tablet is already compromised can be a challenge - to say the least.
I wouldn't be surprised if we see more and more users here who went your route, never got ADB and fastboot going and find themselves stuck when Android does not boot....

That said, I'm glad you can experience KK goodness now and I'll head over to your new thread - maybe I have another idea