I believe Josh, like myself, is just trying to make it clear from experience the easiest way to do it so that you don't waste your time and so that you can have full benefit of all the time and money you put into a swap. Again, I personally tried to run a Volvo ECU on my B280F engine, after all the time and effort- I went to MS. It didn't make sense to go through everything and have no adjustability especially if I want to go to a different engine, different injectors, turbos, etc. I also left all the stock connectors there in case down the road someone wants the original engine back in it.
As I said before, you need to do what fits your needs and goals and I wish you luck.