What Ive always liked about Inquisition of Kozilek is that its universal enough that its playable against every deck, but its limitations are present enough that it leads to interesting decisions both around deck building and sideboarding
While it may not expand to a wider audience, we shouldn't cut that tree limb off before it has a chance to grow
However, white has the helpful ability to "tax" other players for having too much land
Deathtouch doesnt always have to be defensive
For example, Sidisi, Brood Tyrant and Narset, Enlightened Master are incredibly popular Commanders, the sets tri-lands are staples, and Hardened Scales is one of the best +1/+1 counter payoffs in the game
Do make sure to note that Imposter Mech can only copy an opponents creature, which prevents crazy Sharuum, the Hegemon loops