Hold on, I thought the tactics were just “click Leprechaun and then click Chrysantherax.” Am I missing something? 
Jokes aside, there are still areas where the game is more tactical, especially for newer players without access to all the troops and massive stat bonuses. Pure delves were fun because they relied so heavily on strategy and careful planning (though admittedly some also had a massive reliance on RNG at higher levels).
Edit: this reminded me to suggest a game mode I’ve been thinking about lately, similar to Slay the Spire: Deckbuilder Game Mode