she was still limping today (access drained on Thursday) so I don't know if thats normal of not,
Oh so she is/was lame. Yes, depends what's going on, but there should have been significant relief for her as soon as the abscess was released - think an abscess or blood blister under your nail - the pressure is what causes the pain. But it may still be inflamed & even not, if significant, would have caused bruising, which will take longer than a couple of days to heal. Don't let it go on for too long tho - if she's still just as lame in a couple more days, or still gimping after a week, then I'd get the vet.
she's going barefoot for the while, hopefully the other foot won't do anything since the farrier agrees it was probably caused by leaving the shoe off for too long
When I said I'd advise no conventional(peripheral loading rims) shoes, I didn't necessarily mean barefoot. She may well need artificial protection. You haven't said where the abscess was, but if the farrier cut a hole in the sole, then she WILL likely need protection, and for it to be kept clean, until more horn can grow over the hole.
I don't believe that 'leaving shoes off for too long' caused this in the least. Unless it's from an accidental stepped hard on a sharp rock kind of occurance, it is likely due to her hooves being compromised/weak. Especially if she has been shod conventionally for long without respite, she will likely have compromised hooves, and THAT is likely to allow thin soles/bruising/abscess.
I'm not hacking her for a while just to be sure, theres a down hill road we walk down to hack and the access is on her front foot so it wouldn't seem fair, sticking to sand schooling for a while once she's back to her normal self...
If the abscess has come about due to thin soles, yeah, hopefully she will be fine on sand & other yielding surfaces bare, but if that's the prob, you could look at the abscess as a symptom
rather than THE
problem, and she will need protection/support UNDER her feet(so not rims) for hard/rough ground for some time, as PART of her rehab. Generally, hoof boots are a pretty good option there, and you can take them off when she's not working on these surfaces.