Shadows aren being touched because they aren't oP. they are strong 1on1 because of utility.
The only thing that needs fixing is for bads to stop being bad.
If you don't mind, I might want to quote that last part on my signature
Shadow tanks will not retain anywhere near their usefulness in ranked WZs, mainly because they are generalists. A Vanguard or Guardian in a decent premade will me marginally more useful...not gonna stop me from playing my Shadow, but that's the truth.
Also, can we please stop calling Shadow tanks with stalker gear "hybrids?" They are not hybrids. They are tanks in dps gear, because putting tanks in full tank gear is not very useful for PVP. The hybrid 23/0/18 spec died a long time ago.