BarryChucklePessimistic prediction: jetpack bombs from overhealed pyros who are good at airblasting will be too too difficult to defend against, as any airshot attempts will involve a huge risk of the pyro dropping your med with minicrits. Community will suggest "reflects do not minicrit while airborne" stat for all flamethrowers. Despite it being a relatively small change to implement, Valve will not rebalance for several months leading to jetpack being banned in 6v6 and we all end up back to square one.
better unban the RS now
-Added: Attacks on targets flying via the Thermal Thruster mini-crit