I had a BB435 for Sweetwaters 30 day trial and loved the bass, but I too disliked the string spacing.I have recently been in the same boat, considering a 34" fiver and was strongly considering the BBP35 based on all the positive reviews.
However - this week I had the chance to play the lowest-tier BB, the $349 BB235. Of course, I'm not gonna compare it to the $1,899 MIJ version, but I wanted to play it as soon as I saw it because it has the same body and neck dimensions as the BBP. But I found that I just wasn't comfortable with the 1.69" nut width - the string spacing was just a smidge too tight for me in the first few frets, and this is coming from a 1.5" jazz nut 4-string guy. My other 5ers are a G&L with 1.75" and a Modulus with 1.85", and the Yamaha just felt too tight at the nut. Loved the 18mm bridge spacing, didn't love the 1.69" nut width...
Of course, YMMV, yes I could probably get used to it, but it felt too tight for me to be comfortable swapping back and forth between my other basses.
I will also say that the BB235 was legit surprisingly good for being $349; I can only imagine how solid the BBP must feel and play, I'm sure it's amazing.
The bass was perfect! Not a single flaw, just wasn’t used to that tight spacing, so back it went.
I now play only 4 strings and have a BB234 that stays at work, eyeballing a BBP if they offer some new colors, I’m jumping on it.