The problem, once again, is with troops/weapons that do too many things.
Dragon Eye transformed a troop and exploded the board, plus all the hero traits and stuff.
L&D does true dmg. And gain Life. And curse. Plus all affixes. The extra hero bonus, like barriers or stealth or spiders is a problem.
Same with dart. The extra-turn is just dumb on it.
We are at a point where too many things happen for 1 action.
Match 4 brown and get mana, explose stuff, extra turn, a barrier, freeze , bless, kill the last troop, entangle the first, summon a storm, get a pizza delivered, feed a cat, pass Go and collect 200$