That's fair. I certainly agree that the earlier they announced the coming of PF2, the more time they could give 3PPs to adjust.
(Though there's a bit of a double-edged sword here, since I'm sure the announcement of PF2 dramatically dropped sales in 3PP PF1 products too. So in that sense, 3PPs with good long-term sales (e.g., Spheres of Power) would have wanted the announcement delayed as long as possible.)
I had to dust off my memory to remember what exactly Paizo complained about, but looking back through
Lisa's 2012 retrospective history, Paizo's three big complaints about 4e were:
- WotC not extending the OGL to 4e,
- WotC not providing any details regarding what 4e was going to be like (Jason Bulmahn had to make a special trip to WotC offices four months prior to 4e's release to learn anything about what 4e was like),
- 4e not looking like the kind of system they wanted to write adventures for.
I take it Paizo clearly did better with respect to the first two complaints, since Paizo did extend their OGL to PF2, and released a working draft of the PF2 rules to the public a year before PF2's release.
I grant, though, that the third complaint is one that many 3PPs could also reasonably make about PF2, given how different PF2 is from PF1.