I really think Irene will be one of the victims who we will see get rescued, then the next time we see her a few minutes later, she's wrapped in a towel in the hospital corridor (or equivalent), coffee in hand, insisting "I'm alright darl, I'm just worried about Bianca the poor love"... and that'll be that. She has no partner to break up with or child, so they probably won't see any potential in having her suffer lasting effects. It'll all be about Bianca and Ricky, I'd put money on it.
Lynne did only say she was 'involved' in a big action storyline, which she has been, simply by being in the hall when the bomb exploded, she didn't necessarily say that Irene would having her own personal story strand as a result.
Argh, I have such massive long term plans for Irene stuck in my head, from inception to conclusion (can't share, because the writers will never be able to do it then!)... now if I only I was on the damn writing team