Yer I will admit if it was on par with the Jetpack it would be OP maybe if it was 1 or very maybe 2 points just to represent that you do have additional mobility might be nice, but personally I prefer the flying enemies counter bit. Also seriously lust builds aren't used much I must be in the minority since I play lust builds only with damage for when I need it?
That said there are a few non lust based tf's advantages, cum-cow treatment gives a perk that permanently makes it easier to escape grapples, Resin from Cerespin gives you additional resistance to electric, kinetic and corrosive while burning damage is increased that said it also lowers reflexes by 30%. Finally while arguable the perks that let you restore energy by drinking your own milk, cum or getting cummed in more so for the ass as it can also heal you, could be seen as a combat advantage especially for tech which uses a lot of energy. Basically what I am trying to say is that due to most things not having perks the things that do are much more appealing. And the same could be said for NPC's that can give perks whether permanent or not, as it pushes players to interact with them to get the benefit regardless of if they like them e.g. Rage & Calm Aim from ????, Limber from Paige, and those perks you get for doing sessions with those two NPCs one is on Tavros and the other is on Myrellion (I don't know their names they were just buff vendors for hard battles).
Also I can't think of a single reason you shouldn't be using the Jetpack on every class that isn't a merc, drones aren't strong enough, and the alternatives are defense raising items that don't scale as well, resistance items that only work on merc due to being a HP tank and Sexy items that give you debuffs at the same time.