Hi Maverin!
All the interiors and characters are compatible with the RPG Maker MV/MZ! Many animated object are unavailable cause the rpg maker frame cap is 4, as you may know!
The plugins help with movement and collisions, cause many interiors don't exactly fit a square or multiples (that's obvious at sight). I'm not sure how much time do the plugins require to be used, cause I'm not an RPG Maker user!
Have a great day!