By coincidence I worked both 9J2BO and ZS1EL on 10m yesterday. In each QSO we discussed BERU and SARL. Brian was ambivalent. He would prefer BERU to stay as it is but recognises the need for change to fend off interloping contests as the sunspots decline. Vidi is more positive, He said BERU is already rather boring from the deep south and anything that increased activity would be welcome. He said the same about Marathon too!
Of course you will want to canvass opinion directly yourself before making any changes, but I was encouraged that these two stalwarts are not up in arms at the prospect.
Enjoy the Caribbean. Hope to work you.