I don't want to ruin or further monopolize the conversation.
Don't let us filthy Brits put you off posting! Our gobs are far larger than our brains (well, ok,
my gob is larger than
my brain!)), we'll be needing some grounded interjections to balance the Tempest 2 induced insanity out a bit!
Regards cooling, for my t'penth worth, I think the Revolve 2/Tempest 1 stems were actually over-engineered (in a good way) for their typical use, and maybe over-cooled in some cases, causing a higher level of condensate in the vapour path. It also meant the sleeve (with non-wood) tended to get hotter than the T2's because more heat was reaching it as it cooled the vapour but the lower mass concentrated the heat making the temperature higher.
While
@Brenyo will quite likely say I'm talking out my arse here (otherwise known as 'precision farting') being the talent who knows the truth of these things, I'm wondering if the change is to make more use of the Ti as a heat sink to remove heat from the vapour rather than relying so much on a high surface area (e.g. the spiral) and this has the effect of having enough Ti mass to 'hold' all that heat without rising above a certain temperature, while keeping a far more open air flow because of the less convoluted path causing less friction (smaller surface area) plus a generally wider pathway it appears. So my guess is the actual mass in the shield and stem is an important part of how it still cools so well, plus the Ti in the vapour path helping to conduct that heat throughout the metal keeping average temperature lower (even though there are more joules (or calories if you prefer).
If I had to guess, I'd say the very inner core of the vapour path gets hotter than it would seem from the outer temperature, and this prevents as much vapour from condensing, keeping the vape cleaner, and contributing an unknown amount of extra active compounds to each draw (i.e. may be too small to notice the difference?).