Having looked at it, tethering is just too safe for eve.
The old stations don’t have it, so why do citadels? You basically have two different systems in the same place.
Its detrimental to pvp and the risk culture of eve, its stops the vulnerabilities that people have to expose themselves to.
We have managed fine without tethering for eve for the majority of its time with stations, outposts don’t have it.
It allows the defender too much of an advantage. I don’t think eve would fare any worse without it.
There are many functions you can perform in the bubble that you can’t do while docked: scanning, dscan, etc. Some of this is replicated by the “View Outside” option of citadels, others can only be done while tethered. As with any system, it is a set of competing compromises. I, for one, like that there are no longer “station games” on Citadels because aggression breaks tether AND prevents docking. We have that feature on neither stations or POSes yet I find it to be a vast improvement over both.
@Terranid_Meester POS’s have shields… also, tethering is there for staging without having to warp to a safe… Citadels are designed for alliance bases, but I feel like Engineering Complexes and Refineries are a different story.