Jonathan,
As to whether you should or shouldn't do meditation, that is up to you to decide. Meditation brings about radical change; it's stupid to do it if you think you shouldn't.
As to whether you have crossed the A&P, that is very, very likely, given that you are posting this stuff in the first place. Just remember back to some time in your life when you were really enthusiastic about this or that happening in your life; when it was especially easy to feel pleasure (bodily pleasure, intellectual pleasure), where maybe you were charismatic and had a lot of energy, and this grew and grew. And then it was no longer there, and things suddenly started being more difficult, and you started having to deal with psychological stuff. Maybe it was just a few hours during an LSD trip.
As to whether you having crossed the A&P means that you necessarily should do meditation, it doesn't. That is your choice to make. I know people who have crossed the A&P and still choose not to do it, and lead interesting and engaging lives nonetheless. In my case, I don't feel I have a choice, I feel that I need to know where it leads.
Now, in case you decide to continue doing meditation:
With respect to using different techniques, just do it. Don't fall under any organization's bullshit dogma. If you ever use the goenka retreats again, just lie and say you've been a good boy, and during those retreats use whichever technique you think will take you further. Be pragmatical; explore; take responsibility for your own practice.
With respect to solving mundane life vs. doing meditation... I know very well the tension that you refer to, but you shouldn't polarize the matter in this way ("should I do A and not B or B and not A?"). Remember that meditation is aimed at making your life better, and that includes mundane life as well. It is best not to let your mundane life completely fall apart, even if that means you'll take longer to attain whatever you wish to attain through meditation. In the end, you need to eat and can't just zone out into the psychosphere. On the other hand, expect that certain sacrifices are necessary if you wish to maintain a meditative practice. This means changing habits non-conductive to a daily practice into those that are; this means reading about meditation and learning from others; this means taking the time to do retreats.
Oh, and good luck