Cherie Amour Finished....or Not

Last week end I got up to this point:

Pattern: Cherie Amour by Ashley Adams Moncrief

Yarn: Merino Bulky in Lemon y Naranja

Needles: #13/9mm circular - #9/5.5mm circular

Now my dilemna: I'm not sure if I should do the long sleeves like the original pattern or leave it as it is. If I leave is this way I can wear it when it's pretty warm even though the yarn is thick. If I do the long sleeves, I'm worried that I'll have to wear it when it's pretty cold, but then my neck will be exposed...

I guess I'll think about it a little more.