The first elemental weapon series is an exciting thing without doubt, but there's some worry about the weapon type availability of this series.
The July Updates Introduction Video shows the exchange shop of Xiandy (from 1:56 to 2:01), if we look carefully at the item list, we can see the listed items are Sword, Wire, Saber, Knuckles, Launcher, Machine Guns, Talis and Wand. The names of Partisan, Twin Daggers, Assault Rifle and Rod are missing. And from 2:10, they show each weapons in action, but again, only the same eight weapon types are displayed.
It might be possible that these missing four weapon types drop from seasonal enemies. But maybe people utilizing these four types can try to learn some alternate combinations before the event starts.
(Where's my Launcher/Assault Rifle!? )
EDIT: Additional translation nitpicking
The "Introducing the Rarity 3★ Weapon Glissen Series!" section of the July updates article has a following part.
"Weapons in the Glissen series have the Lightning attribute, so if you use them to hit an enemy’s weak point, you can build up the Elemental Down Factor without having to use Techniques!"
This can be read as hitting a non-weak point of an enemy with Glissen won't accumulate the Elemental Down Factor.
If we check up the JP counterpart of this article,
the arguable part in bold can be translated as "exploiting enemy weakness". It's not specifically talking about the weak point part of an enemy. So it might be possible that hitting non-weak point part with Glissen will lead to an Elemental Down.
Although this is an ambiguous point, it can easily be verified once the event start. Just we need to be aware of both possibility.