This mod shifts the design of Demolishers slightly back towards the original idea that was introduced. It does this by increasing hp of all demolishers by 4x, while halving their regeneration. This makes them a bit less of a pure DPS check, and means some depth of defense has benefits. The way the numbers work out, demolishers are now regenerating roughly 1% of their total hp every second.
While this does allow a bit more kiting to be possible, which is what Wube wanted to avoid, it is still effectively impossible to engage in long boring kiting. But it also allows for engagement times that are more than a few seconds.
The greater HP also means demolishers can do quite a bit more damage before they die. This is designed to be paired with something like Rampant or another mod that allows demolishers to go on the offensive.