It's so unfortunate what happened to Bet/Julie regarding her return. Nobody can deny she's an all-time classic character and one of the street's best, but unlike other legends here was somebody who actually WANTED to come back.
I know this is all easy to say in hindsight, but they should have eased her in gently. They also shouldn't have held her quitting against her. Instead they should have said "Ok, that didn't work out very well for any of us. Let's work on a way to bring you back more successfully" and came up with a plan to get Bet back on the street in a way that Julie could cope with. I'm not saying one rule for her, another for everyone else, but if Julie couldn't handle so much work, then why not make her an impact character (like Morag on Home and Away), bring her in for guest stints, give her storylines, then write her out again.