Dear DE, As just a average player, not hardcore one. I must say since Arbitrations release, I avoid it as much as I can not because of it's permanent death but it's too boring to keep going to get rotation C for reward that I want. Please understand that If you want Arbitrations is tough, it's not mean to make it as long as possible like some recent Alert or Nightwave. (Which suddenly I complete this season ~ No, I don't go to do 60 Min of Surviving, IT's not that tough but it's will boring as hell since I done it when release for first time.
The real problem is here, I'm not sure what is your team was think about adjustment of events, now no matter events that you want to make it tough, you make it longer. Like Thermal Fracture events when release its need like 20 min for 7 point if our team was not do switch those thermal tank. I think it's is quite fun at start but end up I'm so boring cause it's take too long to finish one that why i'm really thank that you adjust it make we can finish it in one point. even it's too late for me.
Back to Arbitrations problem. I know that you don't want people to spam this too easy to keep ppl play. But actually it's already limited by 1 hour mission rotation, So no matter people finish it in 30 min or 15 min both need to wait until next mission rotation come. So It's not better to make people no need to pay attention for too long. So people can enjoy it's more than pain to do it?
It's sure time on mission is one burden that make mission feel tough. But it's also have one point that tension become boredom cause ppl will keep weight that is it still worth to do it or not. Let's take example New Arch gun riven that need 25 VE , if not exc. Mission most of them is 10 min for 1 VE, so it's about 250 min of Arbitrations, If got good team that can stay at least 30 min, you talking about 9 round for only 1 Riven. And you need to stay full 30 min for 8 round plus 20 min on last round. So If ppl who want that arch gun riven bad for some reason, but he is just have time to play like 1 or 2 hour a day. You asking them to sinking half of their play time on Arbitrations even that their still need 5 days or so to complete one that riven. that is calculate with all good bias , no fail run, no sh-t host migration, no attention on other events (cause you have 30 min left on each hour you can play before new mission rotation land)
Now I think you can catch idea why people keep asking for shorten it's rotation time. It's not about people think it's tough but it's boredom and take too long time that better to use for do other contents. And also with no need to remove perma-death. If time limit for each rotation back to 5 min. Ppl who die will likely can wait for end of rotation than leave with no need to bother about death method, I really think ppl who leave only one reason that they need to just wait for almost 10 mins.
Yes you can make some long run events, but for rare events like special alert or weekly, monthly events. But please not for something that need spam to farming. Very little of your customer enjoy pain to stay on survival mission for hour every day or several times a day.
So conclusion ~ it's about you want to make Arbitrations for just Hardcore people who have tons time to play and have good team to keep along, or make a chance for some average player who join random party which some of them just want VE and keep say they will leave on 10-20 min no matter you try tell them 30 min will got good item rotation but they just want to leave cause it too long....
PS. As I say about Nightwave 60 min survival, I'm not dare to call my friend to do it again since last time he say he need to rest his hand cause he need to keep slash enemy for 60 min... I only can say ppl who think it's good idea to make this 60 min survival not care about player's health at all.