Are you going to stay up all night and "fix" even more? (lol)
Haha, that's a fair point.

Although I run BB4+ on both my systems with zero issues, stable all day long. OP's mileage may vary.

To clarify for OP: BB1&2 were released by H&P, as updates to the original 3.9 release. BB3/4 are more "community-sourced", in other words they were put together by Amiga enthusiasts and contain updates to drivers and libraries and other software, beyond what was available when BB2 came out (in 2002). So by installing 3/4 you're going to get a much more updated system, but maybe without the benefit of some of the more extensive testing H&P did.
My .02 cents, I would always install them, because I want my Amiga to have the latest and most up-to-date drivers and libraries. I haven't had any problems, maybe just needed a few tweaks to the Startup-Sequence for optimal performance. But some people are scared of new things (Russian proverb: "New is first enemy of old"), and would rather halt their progress with the "official" BB2 circa 2002. Or for some people making edits to Startup-Sequence is unfamiliar territory. Blah blah, try them, if it doesn't work just reinstall again, since now you know how to do it.

LOL