I do get regular notices from Fidelity that being overseas they will not advise me on anything and that their website is not for overseas customers. When on the phone with them recently they would not even tell me what investment options were available to me.
I have my IRA with Fidelity, my wife's is with TIAA. She has done nothing with TIAA since we came here (4 yrs) and so has had no issues. I like to fiddle with my investments so first noticed I lost the ability to put new money into mutual funds, then the same happened with ETF's. Recently I tried to buy CD's and those are closed off now as well. Not happy that I was not given notice of these changes. I'm stuck with owning individual stocks or a practically interest-free sweep account. I imagine all US firms have to abide by the same guidelines; they might just act at different times.
I'm loathe to transfer our substantial IRA's to UK firms without knowing if we'll take a ridiculous tax hit. We're not drawing funds yet.
Don't know if this helps, just ranting.