Attempt at constructive feedback with regards to the new hack objective

Alright, so we have a new hack objective introduced in the last patch.  The objective has caused quite a ... difference in opinions between forum members, ranging from 'what are you thinking, give me old hack back' to 'it's good, live with it'.  This thread is designed to provide a poll to see where the people's opinions stand as well as to propose other possible ways to change the objective to make it more difficult than the old one.

Original Problem: Pre-1.09 hack objective was basically a free win as long as enough players had oxygen flow to their brain and could make it into the circle
Current Solution: Make Hack objective behave similar to Upload, where enemies can contest the progress (and revert it, if there are no players) if present in the hacking circle

Problem with current solution (IMO): Really the issue mainly arises in Platinum and largely due to addition of boss mobs and very quick respawns.  It is extremely difficult to deal with endless stream of mooks while also taking cover from boss mob fire.  Added on top of that, new enemies (boss zerkers, hydras, etc) have very high hp pool and high mobility, rushing into circle to contest it.  Additional problem arises when stealth approach is taken (part of the group lures enemies away from hack circle while infiltrator(s) hack it) when one non-stealth class can ruin the objective by sitting in cover and eating consumables to stay alive, drawing enemies into hack circle, but not actually being able to kill them.  This is open to both griefing as well as getting people kicked. 

I understand that objective is supposed to be difficult, but in the current state I believe that it's too open to griefing and too difficult to PuG compared to all other objective types.  I have listed some possibilities.

The variation of the two first choices simply means adjusting things like hacking speeds, circle size, or anything that does not change the underlying mechanic.  Third choice will exclude certain enemies (most likely redbars, and/or others) from contesting the hack circle, allowing the team to concentrate on keeping 'meatier' enemies out of it, while risking being overrun.  Fourth choice would use some sort of adjustment to hack speed based on the number of enemies vs players in the circle.  This can range from simple 'if there are 4 players and 3 enemies in the circle, then the speed of hacking is that of a single person in the circle' to some more elaborate version.

I am allowing to pick more than one answer because some people will be ok with more than one of these.  So, vote away!