1) I’ve done this AV quest in first try. So as many other people. It’s a usual gameplay. Someone spent 10 minutes for do a quest, someone hours.
2) It is also usual gameplay. Enemy team could also to want make this quest. Even if it is just griefing, try to remember how it was due questioning in open world, where every second enemy player wanna kill you. When you have 1 npc and 10 players who want to kill this box for quest. Or even when you are 32 lvl in SV and there are 60lvl rogue kills you.
3) Absolutely easy to done this. I’ve done this quest from first try also and have about 5 wins with 5 bases per 3 days.
The only thing is, I hope the quests will be different each week. I don't want to do the same list week after week. I want innovation, surprises, expectations of the unknown. I realise that most likely no one will come up with new quests every time, but you could make 100 such tasks and just alternate them week by well so they don't get boring :)