New AR infusion slot
It’s likely for several reasons.
1. That way, you can try to keep your AR in dedicated slots, and use the normal infusion slots for other things (stat infusions, utility ones, devs also hinted that there will be even more choice of later on)
2. It lets devs get easily from having to prepare infused versions of all other ascended gear beyond rings and backpacks. We already know that Anet thinks that doing complicated workarounds is preferable than having to fix small things or admit they forgot about something.
3. It introduces a lot of grind for people to do – if no new fractal levels will be introduced it will be a meaningless grind, but a lot of peope will do it anyway just in case. And since that grind also eats Thermocatalytic reagents, it also doubles up as a gold sink.
In short, pure win.
Remember, remember, 15th of November