This. It would be once thing if you had a key to swap to forward and a different keybind to swap to rear. But no. You MUST cycle to rear first. If you're already under fire from the front, that means the active is useless as a quick defensive cooldown. If you are under fire from multiple angles, it's also a bit of a crapshoot. All of it is a recipe for newbies getting themselves killed.
QCS gives you defenses on demand, without needing to think ahead, and most critically, gives you the mobility needed to not take damage in the first place. It is, imo, unambiguously the best choice for new strike pilots, and because of the mobility benefits, even for veterans. Facetanking will always lose out to skillful piloting in gsf.