Thanks for your response. Yes, CLK1 and CLK2 are irrelevant, I tried to show that there is considerable skew between these clock ports of these flops. The real question is + => - or - => + transitions.
I would think + => - should not need a lockup latch. How about - => + ?
Both + => - and - => + dont need a lockup latch as the hold requirement for them is half cycle. This is a good article I found on the web related to this.