Rotor maximum: 5 points (2 pts armor, 3 internal). 30% of your hit locations, but hey, it reduces big hits to one point...and small hits to one point.
individually, not bad.
Difference: Rotor is your motive systm, so every 'motive system crit' hits the rotor.
VTOL=Vehicle, the majority of your crit-hits? rotor. Including TACs.
What happens when your VTOL loses due to motive system damage? It falls out of the sky and becomes wreckage.
When a Tank loses its motive system, it becomes a bunker. Largely the same for a 'mech that loses its legs, it can usually prop up on another limb and keep shooting, presenting some kind of threat or asset.
Crashed VTOLs become part of the terrain if they don't outright explode from the falling damage-they do not become a fighting part of the terrain like other vehicles do. They become a wreckage hazard.
Sniper role? the YJ isn't a good sniper-it has to flank to get to a position to shoot more often than not, spoiling accuracy. The Hawk Moth is an 'okay' sniper-it has the range with a significant gun, plus movement to position for good shots without flanking, see the difference? Donar? even better, it can do it, and keep doing it after losing 1MP from a spalling hit to the motive system.
a VTOL's hit location table makes it a unit that, unlike other vehicles, you can't park-it has to move in order not to die, because the consequences for being rendered unable to move means it isn't 'reduced effectiveness' but rather, 'it's dead jim'. (Sometimes with fires and explosions, sometimes just wreckage, depending on what's left aboard when it hits and rolls from falling damage).
Hence, the chief usage of heavy armor on a VTOL is to guarantee there's material to salvage for recycling, not to keep it in the fight-for staying in the fight, VTOL pilots have to lean heavily on "avoid being hit" rather than bruting things out like a 'mech or main battle tank.
and again, the force structure that would make a Slow VTOL into an asset, even in the 'sniper role' is likely to be more effective if you don't take the slow vtol, but instead plow that BV into better P/G in your other units. The contribution isn't good enough. Only speed gives enough movement to create tactical dilemmas or impact an opponent's behaviors in a way you can exploit.
Rotor has up to 8 points for the superheavy. Well, 5 points is already enough, though. Sure that would be fallen eventually if it is targeted by the concentrated LB-X attacks. But to reduce that 5 points, you need about 3x5=15 LB-X fragments which hits the VTOL, and it also means you need even more LB-X fragments for you need to hit the VTOL first. You will know that even with the accuracy fix of LB-X VTOL is not an easy target in the first place, so you need several units with LB-X guns to destroy just a single VTOL. And note that it's only for the cheaper 30 tonner VTOL. Yes, you do need several units to order them aim for just a mere light VTOL, while let the other enemy shoots your stuffs freely.
That is the true way to making the attrition. Nothing is invincible, ever, and if you put enough concentrated fire it is inevitable that the target would be fallen. But HOW MUCH assets you need to silence is an another story, and it DOES matters for you never would have infine numbers of weapons everywhere and everytime.
YJ is not required to flank. If it have the chance to do then it would be better but is not required either for it could survives against suffers a 15 damage on the front side. Taking one hit but still functional is already enough. Also being airborne means it does not hampers the others movement at all too. After all, it's very cheap, so if you don't fond of the firepower of only a YJ, you could bring company and battalion of those instead. Again, it's the true way to making the attrition - while it cannot be killed without a critical hit against its front, it could shoots against very long distance, means even at worst and it works as the 'line infantry' it's quite annoying for the opponent's long ranged units. Also its cheaper cost allows you to buying the other stuffs as well, so its nature of one trick pony is nothing but an insignificant flaw actually.
By the way, could you please explain why you falsely blamed me before? I did ask for the answers several times.