tbh I'm pretty confused here, we all know how most ppl feel boring using trap-type skills especially in MXL where thinks happen much faster than in clod. Hell even with 'trap' like u said, limpet laser, fireball sentry, immo bomb, nova bomb, I dont remember seeing ANYONE using them the way u said which is putting them and luring mobs into them. Watch many vids of caster sin using limpet to farm or immo bomb to kill bosses, players always (IIRC) choose the aggressive way, run in or blink in then right click to put bombs under enemy's feet, run around and repeat til' they die. Even in places where mobs surround u so fast like dunc fauzt or I can say any uber, doing so would result 10x better than your 'put trap then lure mob in' tactics. What I want to say is, why ppl play MXL? bc it brings them a much faster and more action gameplay, ppl wanna run around, jump in enemy face, slap them, kick them, kill one whole room of them right when blinking in that room, PROACTIVELY, so why give them the boring statis things which they would most likely ignore? And on top of all that, giving them to an assassin which is the most mobile char in this game? I dont think so man....
about the robots, if they put one more summon skill in sin's skills list, what should they remove? all sin's skills are pretty fine as they are now. even if fireball sentry is useless as u said, it should be replaced with another straightly damage skill not a passive one like a summon. bringing back the whole golem tree to create a sin summon build? then we have the most damn OP char in the history with a 2s cd blink to move all her summons around and stun mobs, she will be immortal, litterally. Rework blink to make this viable? then all the other skills must be reworked too since blink affect the sin gameplay overall and that is too much for them.