I like flying VTOL in the FS series because it's more controllable campared to flying VTOL in X-Plane [which is less controllable]. I tried flying the V-22 Osprey in X-Plane and all I kept getting is a wild aircraft whenever I hover. It gets worse as I transition to level flight because of the twitchy pitch controls.
Katahu, honnestly, appart from helos, there are no VTOL in FS.
Of course, we have those "super-mega-flaps" aircrafts with their ridiculously powerfull engines (yeah, mach4 Harrier, just for fun, as they say

), but in VTOL operations they are almost out of control, very slow to react, AND you have to be going forward, else you stall and eventually get the physics engine of FS to perfome some funny things like throwing your rotating aircraft through the sky ::)
VTOL in X-Plane is more difficult because it's realistic. That's real VTOL actually, not a stupid trick like we use in FS.
The only short term solution I would see for FS, since it seems that cannot implement those vectors, would be to allow multiple engine types per aircraft.
At take off, a Harrier would use an "helicopter" engine, to lift vertically, and in normal flight it would use a normal jet engine. In transition phase, it would use both of them, with a percentage power distribution depending on the angle of thrust. Yeah, ACES guys, read that !!!