When to draft a QB in a PPR league with interesting QB scoring system?

So, I joined a 14 team PPR league with a typical scoring system for RBs, WRs and TEs (1 point per rush or catch every 10 yds and 6 points per TD), but the scoring for the QB is 1 point per completion, 1 point for every 20 passing yards, passing and rushing TDs are 6 points and INTs are -2). This system seems to overvalue the pure passing QBs. Am I correct in this assumption or will the value for all QBs elevate in this scoring system? With a roster of 1 QB, 2 RBs, 3 WRs, 1 TE, 1 FLEX (RB, WR, TE), 1 K and 1 DST, I typically wait until later in the draft to grab a QB to make sure I have a solid core and a little depth, but in this system should I change the strategy to draft a top QB earlier? What would you do?