[Q] Bought used 9506. What are my options (root) topic

I have bought a used S4+ i9506. It has been updated to stock 4.3 and knox status is 0x0.

I see that there's very little development around this device. I have a few questions.

What are my options if I want to root? Are there any?

If so, are there any way of rooting it without tripping knox?

Anyone know if an official 4.4.2 is on it's way? Norwegian phone with csc NEE.