You are correct in that a new kegorator builder could go simpler.
My motto is "if something is worth doing, it's worth getting OCD about and way over-doing".
I considered making extensions smaller than 6", then decided a 6" variance was sufficient.
I only have a starter line of 48" because I needed to be able to open the door with the kegs connected, so that was my minimum distance. I wanted them to all start at the same minimum so I could geek out from there and have maximum control.
I have elbowed tailpieces, which are more resistant than standard, and my faucets are a bit higher than average keezer or chest-with-tower modes, so my 48" lines are indeed likely to be GREAT for just about any beer (maybe not a hefe), BUT, I'm in the pursuit of building this out so I can deliver perfection in every pint.
So yeah, mine is far more complicated than it needs to be, but it is versatile and way over-expensive and FUN and I love the heck out of it.
I do clean my lines and faucets with high-pressure hot pbw, then a hot rinse, then a cold rinse, then a sanitizer run, which is left in the line. I do one gallon of each (I fill up a keg). It's great and I love the forward seals. Hrm. Typing that it seems even my cleaning method is overkill.