Just going to list the good and bad things here. Also do note that I did the Exploiter orb solo, so my feedback is regards to that and not of a squad. Done it 3 times now but it's way too annoying for now. Also actually managed to log in to forums through sheer luck.
-The mechanics of the Exploiter orb are good on paper. The intention is right as you don't need super duper powerful weapons to kill the parts. I used a non-riven catchmoon kitgun all the time basically aside when sniping the coolant raknoids.
-Conclusion to at least part of Fortuna lore.
-Good reward at the end. The mods are okay.
-Forgot to mention, that also a very good thing is that no constant knockdowns or something similar. 😃
-Also, very good voice acting on the Exploiter orb!
Not so good things:
-The coolant raknoids also seem to be shooting the coolant sometimes from behind covers and tight spaces where you need to be in almost melee range (there is a building + the cliff and only a small space between them where there were 3 once for me). Perhaps just make them spawn out of the hills/general open area direction instead behind the mountains. Also this I have no longer experienced as much, since keeping the Exploiter in the open area is very important and reduces the chances of these happening, so this is not too bad at the moment.
-For some unexplainable reason, sometimes the Exploiter orb just creates this flame wall around her which overheats her quickly. No idea what causes it since I kept throwing canisters at her but it seemed very random. It felt like it was timed and scripted. As in "Oh you've been trying long enough, here let's end this." kind of mechanic. Still not sure of what triggers this (aimed canister to a certain spot or during some move or something?) but seemed to be getting it faster as I kept focusing on throwing thermia at the Exploiter.
-When the Exploiter orb dies, for some reason the loot is not affected by Itzal's cosmic crush (the skill that pulls in everything). I literally almost missed having one Hildryn part because of this, which just unacceptable. Why can't at least the Hildryn parts be automatically given to you after the fight? Never understood that. And the fact you can't just go through the Exploiter orb to get the loot but you have to hope it drops to a good spot and then circle around her and get it, since pull in skills don't work.
That's the most things that came to mind. After fighting the Exploiter orb 7 or 8 times solo, figured out how to cut my time in half to around 15-18 minutes.Comparing this to the 10-12 minute run I usually have with the Profit-taker in solo, so not too bad at all. Especially since there are no hordes of Corpus + possible bounce arounds and knockdowns.
Also a general note about the event: I didn't mind the grind really, but the way you handled the opening of the Deck 12... I really would have liked at least to try and solve the code myself. I felt kinda robbed out on that. Perhaps give us 1 day next time to try and figure it out? Even went so far to translate most of the Corpus alphabet, even though one of the letters was missing from the translator. I understand that there are people who don't know how to use google and search for things for some reason, but I tried googling the pass phrase (if it made any sense, as in it's a word) on reddit and forums but found nothing yesterday. And of course there are those who complain that they actually have to do some thinking and searching if we would have needed to do the code, so not too much of a big deal but I hope you won't start dumbing down the game.
All in all, I have liked the event. And the if this is the beginning of future boss fight mechanics to come, really looking forward to those. As long as they are not something similar to the old raids. So thanks.