What you stated was " slayer is the odd class out for having dependence on certain weapons/talents". You then go on to state that one can pick neutral (generalist) weapons and a build that sacrifices powerhouse talents to avoid stuff like hagbane+serrated scenario´s.
I am calling bogus on that.
Swiftbow is an awful weapon without serrated shot so if you pick that build you effectively cant use the random swap shrines since you can get a hagbane or moonfire which might not work either.
But even if you do a neutral start like moonfire + bloodshot +kurnous reward you can still get serrated shots from a random boon shrine and now you are boned anyway. Or you get swiftbow and you´re stuck with a super weak bow because you miss a keystone.
Plus, serrated + hagbane isnt a bug, it´s intentional on fatsharks part as to keep OP synergy down. Its been like that since the waystalker talent rework.