If you fail to file an annual return with the CRO you'll regret it.
Apart from the late fee you will have to get your accounts audited before the next annual return.
The cheapest auditor I could find was €800, I was late , had to pay the fines and then discovered (when trying to hand in the following years annual return) that it had to be audited, so I was late again, which means I have to have it audited again.
You can't have the company wound up until after the audited accounts have been handed in. And my situation is similar to your, never having traded.
The whole thing will have cost me €2000+ by the time I've managed to kill it.