Historically speaking, few companies have launched brand new product lines without a few discoveries along the way.
When Vex (IFI at the time) first launched their wheels in 2006 they had some significant challenges.
You can read about them here. Over the years, they made improvements and they've resulted in a reliable product.
It doesn't just effect Vex. When Banebots launched a new kit gearbox, teams were picked by whether they used them or not. Their failure rate was just that high. Again, over the years they've rectified a majority of those challenges and have a quality product offering.
Vex has some incredible talent on their team, but even Apple, one of societies pillars for quality, who's products "Just Work," can have issues from time to time on new product launches. (Antenna gate anyone?)
I have faith that Paul, JVN and crew will work tirelessly to rectify any issues that arise but it is too early to tell what issues will arise and where.