what about tremorsense for this one???

Am I the only one who feels this spell shouldn't require concentration? Especially with the new mirror image. My players suggested homebrewing it so that it doesn't become useless/never taken. I must say, I'm very inclined to do so. Any thoughts on this? 🤔

A creature with Tremorsense can pinpoint the location of creatures and moving objects within a specific range, provided that the creature with Tremorsense and anything it is detecting are both in contact with the same surface (such as the ground, a wall, or a ceiling) or the same liquid.

Tremorsense can’t detect creatures or objects in the air, and it doesn’t count as a form of sight.

It seems that tremorsense doesn't interact with spells like this one and mirror image since it isn't considered a form of sight. It only makes you know the location of a target, but doesn't grant you blindsight or anything of the sort. I can see a DM interpreting it differently, though. But you might also consider that the blur makes a weird noise, confusing a creature that relies only on tremorsense to target it, whereas in case of a mirrored image, a creature can close its eyes to target the right one as the spell has its effects negated when a target is blinded, it would attack with disadvantage however for being blinded, rules as written. If you ask me, tremorsense should give blindsight for the creature that has it against anything it is detecting, it seems the intended idea. The way it's written makes it only a form of detection instead of a way to reliably attack something.