If the item grants tremorsense but you can't use your normal vision then no problem.
I really think that is the way DND should go with different vision/ sensing paradigms. Infravision users / dark vision users should be at a disadvantage if expsed to bright light, fireballs etc. Tremorsense great for detecting monsters but you can't see walls, stationary objects, or even what the moving objects are doing. Just a general size and direction of movement. If somehow a pc got echolocation just someone screaming in thier ear would put them at a disadvantage.
Dm's usually cause thier own problems by assuming each type of vision is equivilant to normal sight. with the possible exception of infravision none of them are equivilant to sight for a pc that's grown up using normal/ infravision. You change your vision type and you don't automatically get to understand all the things that a creature growing up with it knows from experience and instinct.
I really think that is the way DND should go with different vision/ sensing paradigms. Infravision users / dark vision users should be at a disadvantage if expsed to bright light, fireballs etc. Tremorsense great for detecting monsters but you can't see walls, stationary objects, or even what the moving objects are doing. Just a general size and direction of movement. If somehow a pc got echolocation just someone screaming in thier ear would put them at a disadvantage.
Dm's usually cause thier own problems by assuming each type of vision is equivilant to normal sight. with the possible exception of infravision none of them are equivilant to sight for a pc that's grown up using normal/ infravision. You change your vision type and you don't automatically get to understand all the things that a creature growing up with it knows from experience and instinct.