Engines with lack bottom end power?

Or if you never rev over 3k (obviously I'd never advocate for this, but some folks do), there would be so little difference as to be a wash.
agree
The recommendation for more gear and converter though still makes more sense when considering the idea is to get the engine into the power band sooner (stall) and keep the engine in the higher rev range to be able to tap into it (gear).
100% if I was to run as is
I highly doubt that the 380hp would suddenly become a 'dog' without the stall and gear, but having it will make it feel more like money well spent.
At least, that's how I'd interpret the situation.
Definitely not a dog but not all it can be :) but you do need to get above 35 mph in 1st before you start to feel it's true power. It don't like 3rd under 35 mph though, I leave it in 2nd around town, obviously a set of gears would fix these issues, probably a set of 3.91, turn 5500 rpm @ 110 mph.