Wee need clearly more insect cards support, that can combo well with Insect Imitation + Hundred Footed Horror. Since Horror is level 7 insect, that can be summoned without tributing we need powerful 8 level insects.
...Such a card doesn't exist. The best Level 8 Insect that exists in the TCG/OCG that can be Summoned by Insect Imitation is Metal Armored Bug, which we already have in Duel Links. Gadarla's the only other contender, and Summoning it this way is fairly pointless. (We're also unlikely to ever get the Kaijus here anyway.)