I noticed a lot of people here remove the “tent” (I don’t know how to call it, sorry for my bad England(: ) from their speakers when they have it and a lot of the speakers made today don’t have it from the start; do you prefer to keep it on (and maybe even search for speakers that have it) or to take it off (and in general speakers that don’t have it)?
Some grilles have a thick frame which effectively recesses the drivers and can cause edge refraction that can adversely affect the tonal balance and dispersion. The grille material itself may attenuate treble to some extent. In some cases, that could actually be desirable.
Try listening with and without grilles, and decide your preference.