I've had a 2016 P1K5 Deluxe with over 3k miles and now a 2018 P1K5 LE with over 4k miles on it.
I have been very satisfied with the I-4WD system, no issues at all. Some shy away due to the added cost, complexity, and potential for issues due to the added technology to make I-4WD work and they want the security of being able to manually select a fully locked front differential.
If you dont intend to run extreme difficult terrain the I-4WD does offer the advantage of set it and forget it driving experience by turning easier and tighter than the Deluxe version in 4WD and 4WD Lock while kicking in when needed.
All depends on personal preference, I love the added internal storage, front bumper and Fox Shocks which all 3 can be had for about $2k vs. a $4k difference between Deluxe and LE MSRP.
It all boils down to if painted plastic and I-4WD is worth another $1500 over the aforementioned options.