well smn is a pet class as far as i know only diffrance we wont summon The Ifrit it gonna be more like an ifrit spirit or essence roaming with you
not to mention there is no raise cap so for now 4 at 50 is pretty much alot and dont forget they are changing class>job system so we might end up with 10 job abilities rather than just 5 (restricting 5 class abilities not able to be used by "Job" like SMN cant summon carby) maybe