Unfortunately, no matter how good someone might be in a role - even for a long time - it's not uncommon for their career to not take off after that role.

OUAT takes up a large chunk of her year and she attends so many events for the show as well during her down time. She will probably do other things once the show finishes!

#Evil Regal#

I'm sure she will have plenty of offers once Once ends.
I'm sure she will to, she's very talented.

I'm sure she will have plenty of offers once Once ends.
2000
Libera te tu temet ex inferis.
pro ego sum diabolus, pro ego sum nex.

She's an awesome actress, I just don't understand why she has nothing else lined up besides OUaT! Is this by choice or something?
Lana has mentioned in her interviews that when she has time off from OUAT that she likes to travel. It's the only time she has to do it.
No doubt she is planning on becoming more involved in other projects as she owns a production company and is working on several projects. I wish her the very best in her new endeavors.

Because she's on a TV show full time, meaning she's filming for quite a while each year. When she's not I'm sure she likes to spend time with family, her husband and friends rather than working on another project when she doesn't need to.
If you made enough at a job you loved to not have to work the entire year would you? I sure wouldn't! Plus,there's this pesky little clause in most actors contracts that says they can't take a job if it will in any way interfer with the show/movie they're already working on. They'd have to work with the director/producer if they wanted to do something else and were cast and it did interfer with shooting of their current show.
I'm sure if something she wanted to do came up and she could do it while still on Once she would go for it.
Minds are like books, they only function when open.