With the boards I have waterproofed (mostly mosfets and RC components running 11.1v) I really didn't notice much more heat retention, but I'm sure there is some if you monitor the actual temp of the board.
I agree that the pulse is more of a budget mod. I have a really hard time finding a regulated squonk mod that I actually like. Currently the only one that I actually use occasionally is a USModz Stinger DNA75C. It is not a budget mod at all, and it still annoys me some and does not have the features I want in a regulated squonker. I run mechs almost exclusively because I can't find a regulated mod that fits the way I like to vape.
I agree that the pulse is more of a budget mod. I have a really hard time finding a regulated squonk mod that I actually like. Currently the only one that I actually use occasionally is a USModz Stinger DNA75C. It is not a budget mod at all, and it still annoys me some and does not have the features I want in a regulated squonker. I run mechs almost exclusively because I can't find a regulated mod that fits the way I like to vape.