I wholeheartedly agree. If he'd had it to do over again, I'd guess he'd have got "Ages in Chaos" out there first, and delayed (or even withheld) "Worlds in Collision".
Probably... as I remember Worlds in Collision upset the scientific community. Much of it proved more than 'credible'.
After all, Velikovsky was a scholar, not a scientist. He had a 'gift' that I have seen before.