FWIW this is my stat block right before the Tzimisce at King's Way.
that is a weak build actually, you were calling multiple talking skills dumb, but having multiple combat skills are even worse
if bloodlines were harder game with higher skillchecks and fewer skillpoints, your build would be fucked just like "jack of all trades" are in AoD. there is a lot of places in a game where you can compensate low hacking skill by persuasion or seduction, low lockpicking by high sneaking, etc. every skill you invest in should strengthen those you already have, thus its always better to specialize.
at Kings Way player should have 1 discipline at lvl 4 and 3 main skills at lvl 8. that is most optimal way. and if you want to prove that some skills are worst than others, you have to prove it by exact numbers. every skill could be convert into money and exp. points, because at the end that is everything that have value, so its easy to compare if you know the game well.