Well presented points Falcon.
When I was appointed an MS I had the same expectations. I even recall praying many times for HS to help me. For all that time I never felt anything extra ordinary, just exhaustion, boredom, and envy for those that were not appointed. The more I thought about it, I finally came up with an answer.
The answer is: there is no magic HS coming down from heaven, and praying for it serves the purpose of positive mental re-enforcement and placebo. Whenever you do things according to the scriptures you are doing things accoring to the product of HS and therefore the promise can technically be true; albeit much different than all the JW's think/thought (myself included).
I concluded this because after my many years of service I saw time and time again how family member and friends that really put themselves on the line and needed help and earnestly prayed for it never got the help that they were supposed to get from the holy spirit. It made me conclude that there is a good chance there is no Holy Spirit "magic" that really provides assistance as they would have you believe. The only help you're going to get is from yourself, family or maybe congregation. There is no heaven magic coming down.
If it were the other way around, our case would be like Job, and Satan could just say see he/she is only serving you because you give them super power. The funny thing is to get up there week after week and give those boring parts and express those spiritual feelings that your supposed to have that you don't really does take super humans IMHO.