most people who go with hydro do it because the vacuum booster is too large and no longer fits their application.
As for heat, you can just add a cooler
I was going to do hydro for the longest time, but I'm looking at getting an iBooster now
That's why I said, if you don't need to...if your engine doesn't produce adequate vacuum, you gotta do what you gotta do. But if your engine does, I wouldn't add all the extra plumbing.