Flashing is often the simplest way to fix things when you've done something wrong and you don't know exactly what. It's like burning down the house and rebuilding because you have termites. It does get rid of the termites.

It sounds like you have done some ambitious things and they haven't worked out quite right. Flashing is succeeding in getting you back to zero.

If you are asking how to prevent having to reflash again, you have three choices:

1. Give up your ambitions.

2. Do the things you were trying to do, but do them right.

3. Accept that you may need to keep reflashing till you get them right.

I personally would go with option 3 and be philosophical. I might complain a bunch too; it might make me feel better.

If you are asking for insurance against reflashing, I don't think you can get it.