Depends on the opponent, but I thought it was pretty widely agreed at this point the checkerboard was ineffective against the stronger German players; I know I stopped using it after being burned by the "herding" effect...
I think the German units getting cut off at this point are an indicator his opponent hasn't played a human much yet. But I would anticipate his delays are going to impel him to increase his risks to make up for lost time.
Seeing that SS Mot Div in the southern edge of the Pripyat and the armor near Tarnopol is what led me to warn on the danger. Panzers busting through straight to the east can hook north and meet up with the SS with relatively little combat (hasty is much more likely to succeed in the open terrain as well, and Zhitomir is curiously empty). There's even a chance that another panzer could follow and hook south, capturing the majority of SW Front. In my current campaign I more than once made the mistake of counting up movement costs of blasting through combat/ZOC without the consideration that a follow-on unit wouldn't have all those extra costs. Strategically, I was about a week behind the Pzr Groups capabilities in my estimation of their range. It led to horrendous fall losses.
"War is never a technical problem only, and if in pursuing technical solutions you neglect the psychological and the political, then the best technical solutions will be worthless." - Hermann Balck