By most accounts it was the low performers who were removed.
Ronler appears to be more than that, but there was an urgent need to downsize TD and the fabs at that site after having grown headcount so much in the race to 18A (which is yielding nicely and should prove to be competitive).
Some groups which will be the first to experience outsourcing got greater than 20% layoffs, in some cases most of those groups will be gone but they can apply to the outsourcing firms.
Obviously each person affected is experiencing something life changing, but for the company as a whole it appears that LBT has pushed the org to do what he said he wanted done, which is to reduce bloat and lighten middle management.
He never said he wanted to get rid of those employees, many of whom were just middle managers because of the need to keep progressing in grade or be pushed out. Doesn't appear that incentive has changed, but rather that it has been reset and now it should be even more competitive. That should improve the quality of management, but we will see about that over time.
Now comes the hard work, outsourcing of many job roles and entire groups, and the sale of fabs and entire fab sites, plus whatever product groups which will be sold instead of just shutting them down. These changes will all show up when they happen and so be positive surprises over the next few years. Well, positive to the stock at least.