Yeah. 150 skill points will cover more than enough. But by then we are talking about 50++ (Veteran x2; finding all shards in the whole world... all factions).
And I doubt you can morph passive abilities (IIRC passive skills don't have a progress bar). Unclear if Ultimates can be morphed. Some abilities are also FREE (Soul Trap from the World skills Soul Magic line, Ambidexterity from the Race skills Dark Elf line etc...)
Basically you only need 10 active skills that you morph and 1 or 2 ultimates.
There will be quite a lot of passives that will benefit your build, but a lot of passive skills require that you wield a particular weapon or wear a piece of armor or have abilities from a specific skill line on your hot bar in order to work.
This mean you will have enough skill points to build the "perfect" build even without going veteran.
But without veteran you would have.... what? ~80 skill points?
Race (where we assume that first passive is free), two weapon lines, one armor line, all three class lines (and one morph on each active skill but not on passive and ultimates) = 86 skill points.
That is going to be *very* tight....
nothing left for guild or disease lines, another armor or weapon line etc....