That might be that...

Because heavensward skill are so strong (minus dissipation...)
That in the end you don't need to juggle with everything.

Well as a Crafter and all in hand player i play with 4 bar XD
(Virus and virus macroed take place...)

...

Edit : i can find 34 skill for the scholar and arcanist... HW included
Did you include the fairy skil ?