I can answer at least one of them.
I downvoted this one (and none of your other ones, and don't think I ever saw those to be honest):
How to quickly and easily set up and maintain VPN's ? (Have Juniper SSG-140)
Why did it even come up? Someone edited your question and set it to vote close.
I downvoted it after seeing it per the downvote "rules":
This question does not show any research effort...it is unclear or not useful
as well as did my own vote to close...
The reason I voted this way was because reading the question (and being an SME of sorts on Netscreens) I felt the question lacked any research. You didn't post options you were considering such as NSM, etc. You didn't state an Juniper KB articles you found confusing/intimidating (they have full flowcharts and walkthroughs for VPNs, and the GUI on the Netscreens has VPN wizards). It was more of a rant question followed up with an opinion question:
I find setting up new VPN profiles to be a PITA. I have to follow a bunch of steps, test it out, etc etc.
I find running an SSH server is easier as far as new user set up (e.g. the user accounts are in active directory, and there are other easy tings about it.)
Also, your real question was How can I make this easy as pie to administer and manage? which is basically akin to asking a question like "How can I make administering [insert IT tech here] easy as pie to administer and manage?". It became strictly opinion based at that point.
I wouldn't be too concerned about my downvote though...I meant nothing personal against you. It was more along the lines of like Ward states in voting "school" about how/when to vote. It doesn't bother me at all what you've been posting in Meta. I think you have some valid points and some not so much. I would never set out to "get at" someone on the main site or Meta...I have no beef with anyone here and if I did I would address it in chat and not via votes.