Man, they can do whatever they want to smn if that means I get to keep my carbuncle buddy as an arcanist.
(Which is to say, have arcanist work like smn is now with maybe a beast carbuncle mode where your carbuncle gets hypercharged and RIPPED, and those who want smn to be a slow casting one big hit and then nothing for a while can have fun with the classic FF SMN -the second job smn characters had to actually make those characters interesting)