Indeed.
Also Naoki Yoshida said many times in interviews where Samurai and/or Musketeer was brought up that FFXIV currently has too few Disciple Of Magic classes compared to Disciples Of War and
before he adds anymore Disciples of War, he would add another Disciple Of Magic. Adding Arcanist as a starting class is the simplest and most balanced way to help rectify that, and free them up to add things like firearms, katana, and clubs/mace/hammer classes.
Now I
suspsect that we'll also see Musketeer added at launch. I can see lore-wise how Limsa Lominsa would go all NRA after the Bahamut attack, and open up the Musketeer Guild for everyone. That way starting off, you'll have these options (remember you can no longer start as a Disciple Of Hand or Land anymore).
Limsa Lominsa:
- Arcanist Guild
- Marauder Guild
- Musketeer Guild
Ul'dah:
- Thaumaturge Guild
- Gladiator Guild
- Pugilist Guild
Gridania:
- Conjurer Guild
- Archer Guild
- Lancer Guild
Every starting city would have it's own Disciple Of Magic guild and 2 Disciple of War guilds. It's not a 1:1 balance, but it is a proportional balance that makes sense ... and would be extendable to new cities.
Holy City Of Ishgard:
- Mysticist Guild
- Enforcer Guild
- Fencer Guild