Not all your profit is taxed as income every year
You can just take a salary like a PAYE worker
More scope for pension contributions which aren't subject to USC & PRSI like they are under the personal pensions
Not sure how you manage your accounts with your partner at present, but under a company, you have your company account that pays for the bills and you take your salary. No dividing costs and ensuring everything is split evenly.
I don't find the regulatory requirement burdensome. I pay my accountant to do that and he submits everything to the CSO. The information I give him is no more than if I was self employed.