Don’t jump to conclusions about increased retirement in June. Yes, if somebody is already 60 they would absolutely retire in Q2 because their lump sum can only go down from here, but those over 60 are gone - the unlucky ones were thrown out through NSI last summer, the lucky ones retired in February.
If you’re between 55 and 60, the increasing interest rates lower your lump sum on one hand, but on the other the smaller discount for early retirement, increased years of service and even higher salary average for the last three years of work push the lump sum up each extra year you work. On top of that, if you succeed to work for another year (a big if), you still get your salary, which at the end of the career is likely high (and that’s exactly why the company uses the oversized MLRP to hunt down REs).
Individual calculations may vary, but it would take a way above average interest rate to get you at the point where if you work until mid 2022 you would work “for free” (the lump sum loss equals the salary earned during that time). It’s a possibility but we don’t really know how likely. Besides, by mid 2022 we might see the start of an upturn that would heat up the job market. That would explode EM’s attrition, which is high even today, with a lukewarm job market. That might force even the Dallas geniuses to reconsider getting rid of experienced workers, and it might be possible to retire normally at 61-62. By then the regular salary will overwhelm the lump sum loss.
Given all of the above, there’s little incentive to retire in June rather than wait to see if you get PIPed off and if so retire in September. Yes, the Q3 rates are worse than the Q2 ones, but you don’t loose that much for the lump sum, and you get extra three months of salary and a (slim) chance of eventual normal retirement.