I wish the anime episodes were longer than 3 minutes!!
Then the will outrun the original 4-panel, and start making things up. See also: Naruto.
How about 5mins? I would've loved 13mins (like the on-going Mangaka-san to Assistant-san), long enough to satisfy.
(Still, I feel like 4-komas work best when short)
That'll be good. 3min is indeed too short and feels too packy.
SPOILERS:
Anim ep4, Nekoyama looks just like Matoi Lyuuko when she puts a pair of red top-border-less eyeglasses on.
And the ED pic is drawn by Fujieda Miyabi. Seems they are having a drink in the amber teahouse, with Kotooli Salasa in the background.