It isn't about being "worried about it", to my mind.
A notable problem with playtest feedback like this is that it doesn't demonstrate synergies in the whole design very well. We are forced to think about how a given change would work all else being the same. But, the rest does not have to be the same.
Consider something we always complain about - encounter design. Many of us gripe about how the current encounter design is often a bit soft, for lack of a better term. It seems to me that the chance of crit goes hand-in-hand with encounter design. The swingier the mechanics, the more one is likely to softball the overall encounter design to accommodate that.
Removing the chance of crits from encounter design means that they can more reliably build tougher encounters that won't randomly paste the party outright!
Isn't that something many GMs want?