So, after @ImSpecialOk posted My stupid current project: UFO and i said in the comments that "That wouldn't work because bla-bla-bla" i then proceeded to test all my projectile-based weapons just to see any interesting results.
When i thought: "I wanna see how Zenistar works on her nowadays, maybe it regained some cool features it had back then?" and oh boy was i fucking right...
So the deal so far is:
1. Disk can still be navigated normally and to the much farther distances than it was before, the duration is basic 10 seconds without x12 Combo counter (which is a maximum of 120 seconds then).
2. However, after the duration is depleted while you still have disk under control, it won't return, it will continuously fly in pointed direction with no time limits, the only limit there would be your energy, that is consumed rather quickly... and also after some range that it passed, which can be more than 100m by the way.
3. After you manually turn off the ability or at the depletion of your energy, the disk WILL stay where it's been last time you controlled it for some time, although the exact amount of duration it stays for is unknown due to the weapon's timer mechanic being buggy itself and displays incorrectly, following by the ability ending up earlier than the timer says.
4. You can return to the disk from any distance by pressing the Navigator again while disk is still active, you can't move the disk anymore though.
I tested it all both in Simulacrum and on regular and SP missions, works freaking amazing, better use it with basic 10 sec. duration, unless the damage of fires is increased by combo, then yes, you may build up the combo first.