Yeah, true.
They also can triple Quintet with triple wiping with grass turn 1-2.
They consistently use Invocation with materials from hand = wipe, then Magicalized = 2nd wipe, another magicalized = 3rd wipe.
Complete overkill during turn 2.
I don't understand why they gave Quintet the Raigeki and Harpie feather effects.
Even without those it is very strong.
Immune to Lava Golem, and beatstick.
You want to know why Quintet has "wipe the field" effect? It's because Quintet was designed with OCG/TCG situation in mind, not Duel Links.
In OCG/TCG nowadays, it's easy to bring out multiple untargetable monsters protected by backrow(s), in a single turn. Hence why Quintet can wipe the field, to attract people into playing DM again in today era OCG/TCG.
If Quintet was designed for TCG and not Duel Links then they should not have introduced him in duel links until every decks that exist (including the weakest ones) can spam untargetable monsters.
Decks that stall for Quintet are hard to deal with for the average beat stick decks that don't rely on OTK or effects.