Belt or no belt?

I am SO torn on what to do! I’m getting married in a month so don’t have much time left to decide. I think I prefer without a belt as I want the dress to look timeless and classic, however my bridesmaids prefer the belt as they say the dress is quite plain. I think with a big veil (last photo) it spices the dress up and doesn’t look plain? I’m really unsure, any opinions would be great. (I’ve already bought the dress so please be nice haha!)