We've always had joint accounts for personal funds (savings and checking). Way back when, DH's business AC was separate and I had no signature authority. I always filed MFS before we moved to the USA.
Now we are back in the UK, but DH is also now a USC. So its MFJ.
If your DH is NOT a USC or green card holder, MFJ will complicate things immensely. As far as FBAR goes, this is a REPORTING form, not a red flag to come after you for more tax. And no matter what, unless you decide to file a joint return, your DH's income is not subject to US tax.
If DH has never lived or worked in the US and not a USC, he is a NRA spouse. For folk with ordinary employment income, and a bit of interest, your tax return won't be all that complicated. After you qualify for the earned income exclusion, you will likely owe no tax in the US, but you will need to continue filing if you meet the thresholds (and maybe should file even if you don't need to).
Personally, I wouldn't be concerned about joint versus individual accounts. Many accountants try to scare you, IMHO because they like to 'awfulize' things. One of the happiest days of my life is when a CPA who was also a personal friend told me "we have to charge you a minimum fee to prepare your return; you don't need to spend that money."